Monday, 4 May 2026

On This Day in Math - May 4






I had a feeling once about Mathematics - that I saw it all.
Depth beyond depth was revealed to me - the Byss and Abyss.
I saw - as one might see the transit of Venus or even the Lord Mayor's Show
- a quantity passing through infinity and changing its sign from plus to minus.
I saw exactly why it happened and why the tergiversation
was inevitable but it was after dinner
and I let it go.
~Winston Churchill


The 124th day of the year;124 =σ( 1! * 2! * 4!) *Prime Curios (The sigma function of a positive integer n is the sum of the positive divisors of n)

124 is also an Odious number: a number with an odd number of 1's in its binary expansion.(just recently, it occurred to me that it would be more appropriate if an Odious  number, had an odd number of "0's")

124 in base two is expressed as 1111100.

124 in base five is a repdigit, 444, which means it's one less than 5^3 (students new to studying bases should observe that a repdigit of (n-1) which is  k units long in base n, will always be (n^k)-1. [like 99 in base 10 is 10^2-1]

and ±1 ± 2 ± 3 ± 4 ± 5 ± 6 ± 7 ± 8 ± 9 ± 10 ± 11 ± 12 = 0 has 124 solutions (collect the whole set) *Math Year-Round ‏@MathYearRound

And for Algebra students, 124  is divisible by four so it is the difference of two squares of numbers that differ by 2, and since  124 / 4 = 31, the numbers must straddle 31, 32² - 30² = 124. 


Several More math facts for this date at https://mathdaypballew.blogspot.com/


EVENTS

1612 Galileo writing to Mark Welser, “The spots seen at sunset are observed to change place from one evening to the next, descending from the part of the sun then uppermost, and the morning spots ascend from the part then below …”, *Galileo's Sunspot Letters at http://mintaka.sdsu.edu
The Letters were written to the wealthy Augsburg Magistrate Mark Welser (1558-1614), a well-known patron of the new sciences, in responses to Christoph Scheiner's own Letters on Sunspots, published through Wesler in 1612.
Galileo and Scheiner were later to quarrel bitterly over priority of discovery of sunspots; in fact the first recorded sunspot observation is on 8 December 1610 by the Englishman Thomas Harriott (1560-1621), and the first publication by Johann Fabricius.
The title page of Galileo's letters, published by Wesler, is shown below. The lynx depicted on the Title page indicates Galileo's membership in the Lincean academy (Accademia dei Lincei, for the "sharp-eyed")
*
Groupe d\'astrophysique de l\'Université de Montréal



1675 Charles II orders Royal Greenwich Observatory be built to solve Longitude problem. * Nat. Maritime Museum@NMMGreenwich 
It was Christopher Wren who suggested using the ruined Greenwich Castle as the site for the new observatory. This location had the advantages of having solid foundations in place from the old castle, as well as being located on high ground in a royal park. Wren also oversaw the design of the building.

Flamsteed House was the first part of the Observatory to be built. It was intended as a home for the Astronomer Royal and for entertaining guests.
The first public time signal in the country was broadcast from the roof of Flamsteed House in 1833, by dropping a ball at a predetermined time.





1694 David Gregory and Newton disagree on "kissing numbers" during Gregory's visit to Newton in Cambridge. Newton asserted that 12 was the maximum number of spheres that could be placed touching around a central sphere. Gregory held out that a 13th was possible. Kepler had shown a completely rigid arrangement of 12 spheres around one in his Six-cornered Snow Flakes. His method is called a hexagonal packing. But Newton and Gregory both knew that placing the surrounding 12 spheres at the vertices of an icosahedron around the central sphere, there was enough space to move the balls around, In fact, any two balls could be moved around and interchanged while all twelve balls were still in contact with the central one. The maximum "kissing number" is known for the first four dimensions, but beyond that only the eighth (240) and twenty-fourth(196,560) are exactly known. *Plus Math, *Wik  (Newton was right, but it wasn't proven until 1953.)  If you want to take up the challenge, in the fifth dimension the "kissing number" is known to be 40 <= k <=44.  




1697 John Wallis sends a letter to the Royal Society "Concerning the Cycloid Known to Cardinal Cusanus, about the Year 1450." (modern scholars can not find any evidence to support his statement.) *Wik


1756 A letter from John Elliot, a young naval officer, to his father.
"There is no News here worth troubling you with, only the discovery of the longitude by a Hanovarien, it is perform’d by an Observation of the Moon & any fix’d Star by knowing there distance at a given place & observing there difference at Sea given the difference of time[. T]he obs[ervatio]n is simple & easey but the Calculation is extreamly perplexd. I had this from a Man that is making the Instrument."
The Hanovarien mentioned is Tobias Mayer. *Richard Dunn, Board of Longitude Project, Royal Museums Greenwich

In my poorly organized notes I have a reference without a source listed, maybe the same Richard Dunn above, that this quote came from  Nicholas Rodger's The Wooden World, 1996.  I also have recorded , " Given the historical run of events, this suggests that news of what the Board of Longitude was doing about Mayer's scheme got out pretty quickly, particularly when we remember that sea trials of Mayer's lunar tables and observing instrument didn't take place for another fourteen months (under John Campbell - but that's another story). The last line particularly intrigues and rather delights me. I think the instrument maker in question is the very important but rather elusive John Bird (another of my obsessions). This would make sense, since Mayer's tables and repeating circle were discussed at a meeting of the Board of Longitude on 6 March 1756, when James Bradley was instructed to have three instruments made for the future tests. Bradley naturally went to Bird, already well known to him from his work at the Royal Observatory. So it seems  that within a few weeks Bird was shooting his mouth to a young naval officer. Bird had precious hands but a big mouth, I'd say. I'd love to know more about how his chat with Elliot came about."
The John Bird above, "was a British mathematical instrument maker who was notable for inventing the sextant. He came to London in 1740 where he worked for Jonathan Sisson and George Graham. By 1745, he had his own business in the Strand." *Wik  (Mayer left, Bird right)







1780 The American Academy of Arts and Sciences, the first national arts and sciences society in the U.S., was founded on this date in Boston “to cultivate every art and science which may tend to advance the interest, dignity, honor and happiness of a free, independent and virtuous people.” James Bowdoin was the first president. *VFR [The original incorporaters were later joined by Benjamin Franklin, George Washington, Thomas Jefferson, Charles Bulfinch, Alexander Hamilton, and John Quincy]*TIS
House of the Academy, located in Norton’s Woods, Cambridge, Massachusetts.




1885  On September 5, 1885, Scientific American published a photograph depicting a “streak of real ‘Jersey lightning,’” taken by William Nicholson Jennings (1860-1946) at 10:30 p.m. on the first of August that same year. Captured on the roof of Jennings’ house in North Philadelphia and later reproduced as a lantern slide, the photograph reveals a flash of lightning traveling diagonally from the upper left corner of the frame to the horizon, illuminating the tops of trees and a line of row house roofs in the foreground. Regional and national newspapers soon proclaimed Jennings as the first to successfully photograph lightning with a camera.

The Today in Science claims an earlier occurrence on May 4 of the previous year. " In 1884, the first photograph of a lightning flash made in the U.S. was made by W. C. Gurley of the Marietta Observatory, Ohio. The flash was about 3 miles away."  I don't have a picture of that one (but am willing to post one if someone can find it) so Jennings gets the plug. The observatory in Marietta is named for William Chamberlain Gurley, its first director.

*Panaroma



1925 The ACLU found John Scopes by running a newspaper ad seeking a teacher willing to test the law about teaching human evolution in the classrooms of Tennessee. From the May 4, 1925, edition of the Chattanooga Times:
"We are looking for a Tennessee teacher who is willing to accept our services in testing this law in the courts. Our lawyers think a friendly test case can be arranged without costing a teacher his or her job. Distinguished counsel have volunteered their services. All we need now is a willing client."  
Scopes wasn't a biology teacher but had filled in for one using a textbook that accepted evolution, and that was enough to set the "monkey trial" moving forward.  *Greg Ross, Futility Closet
The Tennessee State Museum on-line sight includes:  
Leaders in Dayton saw the ACLU ad in the paper and knew a trial about evolution would attract lots of attention. Dayton was a small town and the city and businesses struggled to make enough money. They thought the tourism the trial would bring could be a great way to make money. A few leaders asked John Scopes if they could charge him with teaching evolution in order to bring the case to Dayton. It was just as much about the spectacle as anything else. There were six blocks of booths where people sold stuffed monkeys, food, and played music.
*Wik


In 1933, the discovery of radio waves from the centre of the Milky Way galaxy was described by Karl Jansky in a paper he read to the International Radio Union in Washington. The galactic radio waves were very low intensity, short wavelength (14.6 m, frequency about 20 MHz) and required sensitive apparatus for their detection. Their intensity varied regularly with the time of day, and with the seasons. They came from an unchanging direction in space, independent of terrestrial sources. He had conducted his research on static hiss at the radio research department of Bell Telephone Labs, Holmdel, N.J. The New York Times carried a front page report the next day.*TIS

NEW RADIO WAVES TRACED TO CENTRE OF THE MILKY WAY; Mysterious Static, Reported by K.G. Jansky, Held to Differ From Cosmic Ray. DIRECTION IS UNCHANGING Recorded and Tested for More Than Year to Identify It as From Earth's Galaxy. ITS INTENSITY IS LOW Only Delicate Receiver Is Able to Register -- No Evidence of Interstellar Signaling.
First Radio Telescope




1935 Albert Einstein, in a letter to the New York Times, writes, "In the judgement of the most competent living mathematicians, Fraulein Noether was the most significant creative mathematical genius thus far produced since the higher education of women began". *Dwight E. Neuenschwander, Emmy Noether's Wonderful Theorem   
She had died on April 14th, 1935.(PB)
*Wik




1989, the space probe Magellan was carried in the cargo bay by the STS-30 Space Shuttle Atlantis mission launched from Kennedy Space Center in Florida. The space probe was named after the 16th-century Portuguese explorer Ferdinand Magellan. This was the first planetary spacecraft to be released from a shuttle in Earth orbit. It arrived at its planned polar orbit around Venus on 10 Aug 1990, which it circled once every 3-hr 15-min. As the planet rotated slowly beneath it, Magellan collected radar images of the surface in strips about 17-28 km (10-17 mi) wide and radioed back the information. Its mission included taking other measurements. On 11 Oct 1994, it was directed towards the surface, collecting data until it burned up in the atmosphere.*TIS




1995 Commodore Bought By German Company:
German electronics company Escom AG paid $10 million for the rights to the name, patents and intellectual property of Commodore Electronics Ltd. A pioneer in the personal computer industry, Commodore halted production in 1994 and declared bankruptcy. Escom AG planned to resume production of Commodore personal computers, including its most recent model, the Amiga. The company later sold its Amiga rights. *CHM
The Commodore 64, also known as the C64, is an 8-bit home computer introduced in January 1982 by Commodore International (first shown at the Consumer Electronics Show, January 7–10, 1982, in Las Vegas). It has been listed in the Guinness World Records as the highest-selling single computer model of all time.
*Wik




2000 A rare conjunction occurs on the New Moon including all seven of the traditional celestial bodies known from ancient times up until 1781 with the discovery of Uranus. The May 2000 conjunction consisted of: the Sun and Moon, Mercury, Venus, Mars, Jupiter, and Saturn. *Wik




2011 Star Wars Day, as told to me by a student..."May the Fourth be with you."


BIRTHS

1733 Jean-Charles Borda, (4 May 1733; died 20 Feb 1799 at age 65.) a major figure in the French navy who participated in sev­eral scientific voyages and the American revolution. Besides his contributions to navigational instruments he did important work on fluid mechanics, even showing that Newton’s theory of fluid resistance was untenable. He is best known for the voting system he created in 1770.*VFR [He was one of the main driving forces in the introduction of the decimal system. Borda made good use of calculus and experiment to unify areas of physics. For his surveying, he also developed a series of trigonometric tables. In 1782, while in command of a flotilla of six French ships, he was captured by the British. Borda's health declined after his release. He is one of 72 scientists commemorated by plaques on the Eiffel tower.]*TIS




1806  Sir William Fothergill Cooke (4 May 1806 – 25 June 1879) English inventor who worked with Charles Wheatstone in developing electric telegraphy. Of the pair, Cooke contributed a superior business ability, whereas Wheatstone is generally considered the more important of the two in the history of the telegraph. After Cooke attended a demonstration of the use of wire in transmitting messages, he began his own experiments with telegraphy (1836) and formed a partnership with Wheatstone. Their first patent (1837) was impractical because of cost. They demonstrated their five-needle telegraph on 24 July 1837 when they ran a telegraph line along the railway track from Euston to Camden Town able to transmit and successfully receive a message. In 1845, they patented a single-needle electric telegraph. *TIS




1821 Pafnuty Lvovich Chebyshev (May 16 [O.S. May 4] 1821 – December 8 [O.S. November 26] 1894)Russian mathematician who founded the St. Petersburg mathematical school (sometimes called the Chebyshev school), who is remembered primarily for his work on the theory of prime numbers, including the determination of the number of primes not exceeding a given number. He wrote about many subjects, including the theory of congruences in 1849, probability theory, quadratic forms, orthogonal functions, the theory of integrals, the construction of maps, and the calculation of geometric volumes. Chebyshev was also interested in mechanics and studied the problems involved in converting rotary motion into rectilinear motion by mechanical coupling. The Chebyshev parallel motion is three linked bars approximating rectilinear motion. *Wik [I remember a poem about the Chebyshev's theorem first conjectured by Bertrand but proved by Chebyshev.... Chebyshev said it, so I'll say it again, there's always a prime, between N and 2N {there are many variants} PB]




1825 T(homas) H(enry) Huxley (4 May 1825 – 29 June 1895) was an English biologist , known as "Darwin's Bulldog" for his promotion of Darwinism which led him to an advocacy of agnosticism (a word he coined). At the age of 12 he was reading advanced works on geology, and by early adolescence he recorded the results of simple self-conducted experiments. As a ship's assistant surgeon on HMS Rattlesnake he studied marine specimens by microscope. During the 1850's he published papers on animal individuality, the cephalous mollusks (ex. squids), the methods of paleontology, and the methods and principles of science and science education. *TIS




1845William Kingdon Clifford (4 May 1845 – 3 March 1879 ) He played an important role in introducing the ideas of Riemann and other writers on non-Euclidean geometry to English mathematicians. “Clifford was a first-class gymnast, whose repertory apparently included hanging by his toes from the crossbar of a weather cock on a church tower, a feat befitting a High Churchman, as he then was.” *VFR
English mathematician and philosopher. Building on the work of Hermann Grassmann, he introduced what is now termed geometric algebra, a special case of the Clifford algebra named in his honor, with interesting applications in contemporary mathematical physics and geometry. He was the first to suggest that gravitation might be a manifestation of an underlying geometry. In his philosophical writings he coined the expression "mind-stuff". *Wikipedia {He enjoyed children and wrote children's stories including "The Little People."} "An atom must be at least as complex as a grand piano. "
Though Clifford never constructed a full theory of spacetime and relativity, there are some remarkable observations he made in print that foreshadowed these modern concepts: In his book Elements of Dynamic (1878), he introduced "quasi-harmonic motion in a hyperbola". He wrote an expression for a parametrized unit hyperbola, which other authors later used as a model for relativistic velocity. Elsewhere he states,
The geometry of rotors and motors ... forms the basis of the whole modern theory of the relative rest (Static) and the relative motion (Kinematic and Kinetic) of invariable systems.

This passage makes reference to biquaternions, though Clifford made these into split-biquaternions as his independent development. The book continues with a chapter "On the bending of space", the substance of general relativity. Clifford also discussed his views in On the Space-Theory of Matter in 1876.




1862 Alice Liddell (4 May 1852 – 16 November 1934), subject of the Alice in wonderland stories. 4 May is also probably the date on which the mad hatter's tea party took place. Charles Wells suggested to me that perhaps that was the date on which young Alice and Charles Dodgson went for a row with her dad and Dodgson first told the tale. There are, Charles points out, two references to the date being the fourth (the white rabbit for instance has a watch that tells the date, not the time and asks Alice the date) and two referring to the month of May . It turns out that that boat ride was on July 4 of 1862. There is however evidence in the book that Dodgson intended to make the story on Alice's date of birth. In that year, for example, the date of her birth there was exactly two days difference between solar and lunar time. Thus the Hatter's response to the date, "Two days wrong" perhaps. Anyway, a novel idea (bad pun) Charles, and thanks for the comment.
When Alice Liddell was a young woman, she set out on a Grand Tour of Europe with Lorina and Edith. One story has it that she became a romantic interest of Prince Leopold, the youngest son of Queen Victoria, during the four years he spent at Christ Church, but the evidence for this is sparse. It is true that years later, Leopold named his first child Alice, and acted as godfather to Alice's second son Leopold. However, it is possible Alice was named in honour of Leopold's deceased elder sister instead, the Grand Duchess of Hesse. A recent biographer of Leopold suggests it is far more likely that Alice's sister Edith was the true recipient of Leopold's attention. Edith died on 26 June 1876 possibly of measles or peritonitis (accounts differ), shortly before she was to be married to Aubrey Harcourt, a cricket player. Prince Leopold served as a pall-bearer at her funeral on 30 June 1876.
After her husband’s death in 1926, the cost of maintaining their home, Cuffnells, was such that she deemed it necessary to sell her copy of Alice's Adventures under Ground (Lewis Carroll's earlier title for Alice's Adventures in Wonderland). The manuscript fetched £15,400 (equivalent to £1,000,000 in 2021), nearly four times the reserve price given to it by Sotheby's auction house. It later became the possession of Eldridge R. Johnson and was displayed at Columbia University on the centennial of Carroll's birth. Alice was present, aged 80, and it was on this visit to the United States that she met Peter Llewelyn Davies, one of the brothers who inspired J. M. Barrie's Peter Pan. Upon Johnson's death, the book was purchased by a consortium of American bibliophiles and presented to the British people "in recognition of Britain's courage in facing Hitler". The manuscript is held by the British Library.
Alice Liddell as a child, Carroll's first photograph of her, and  at the age of 20, photographed by Julia Margaret Cameron.





1876 Heinrich Jung (4 May 1876 in Essen, Germany - 1953 in Halle, Germany) was a German mathematician who worked on algebraic functions. *SAU


1918  George Francis Carrier (May 4, 1918 – March 8, 2002) was an engineer and physicist, and the T. Jefferson Coolidge Professor of Applied Mathematics Emeritus of Harvard University. He was particularly noted for his ability to intuitively model a physical system and then deduce an analytical solution. He worked especially in the modeling of fluid mechanics, combustion, and tsunamis.

Born in Millinocket, Maine, he received a master's in engineering degree in 1939 and a Ph.D. in 1944 from Cornell University with a dissertation in applied mechanics entitled Investigations in the Field of Aeolotropic Elasticity and the Bending of the Sectorial-Plate under the supervision of J. Norman Goodier. He was co-author of a number of mathematical textbooks and over 100 journal papers.

Carrier was elected to the American Academy of Arts and Sciences in 1953, the United States National Academy of Sciences in 1967, and the American Philosophical Society in 1976. In 1990, he received the National Medal of Science, the United States' highest scientific award, presented by President Bush, for his contributions to the natural sciences.

He died from esophageal cancer on March 8, 2002.  *Wik

George Carrier was considered to be one of the best applied mathematicians the United States ever produced. He loved applied mathematical problems developing complex mathematical models, which he solved with ingenious approximations and asymptotic results.*SAU





1926 David Allan Bromley (4 May 1926; 10 Feb 2005 at age 78) was a Canadian-American physicist who was considered the “father of modern heavy ion science” for his pioneering experiments on both the structure and dynamics of atomic nuclei. He was a leader in developing particle accelerators detection systems and computer-based data acquisition and analysis systems. While at Atomic Energy of Canada (1955-60) he installed the first tandem Van Der Graaff accelerator. He was founder and director (1963-89) of the A.W. Wright Nuclear Structure Laboratory at Yale University, which has produced more experimental nuclear physicists than any other facility. During this time he became active on numerous national and international science policy boards. From 1980-89, he was a member of the White House Science Council.*TIS




1932  Edward Nelson (May 4, 1932 – September 10, 2014) was an American mathematician. He was professor in the Mathematics Department at Princeton University. He was known for his work on mathematical physics and mathematical logic. In mathematical logic, he was noted especially for his internal set theory, and views on ultrafinitism and the consistency of arithmetic. In philosophy of mathematics he advocated the view of formalism rather than platonism or intuitionism. He also wrote on the relationship between religion and mathematics.

Edward Nelson was born in Decatur, Georgia, in 1932. He spent his early childhood in Rome where his father worked for the Italian YMCA. At the advent of World War II, Nelson moved with his mother to New York City, where he attended high school at the Bronx High School of Science. His father, who spoke fluent Russian, stayed in St. Petersburg in connection with issues related to prisoners of war. After the war, his family returned to Italy and he attended the Liceo Scientifico Giovanni Verga in Rome.

He received his Ph.D. in 1955 from the University of Chicago, where he worked with Irving Segal. He was a member of the Institute for Advanced Study from 1956 to 1959. He held a position at Princeton University starting in 1959, attaining the rank of professor there in 1964 and retiring in 2013.

In 1950, Nelson formulated a popular variant of the four color problem: What is the chromatic number, denoted 𝜒{\displaystyle \chi }, of the plane? In more detail, what is the smallest number of colors sufficient for coloring the points of the Euclidean plane such that no two points of the same color are unit distance apart? We know by simple arguments that 4 ≤ χ ≤ 7. The problem was introduced to a wide mathematical audience by Martin Gardner in his October 1960 Mathematical Games column. The chromatic number problem, also now known as the Hadwiger–Nelson problem, was a favorite of Paul Erdős, who mentioned it frequently in his problems lectures. In 2018, Aubrey de Grey showed that χ ≥ 5.




1935  Shirley Ann Mathis McBay (May 4, 1935 – November 27, 2021) was an American mathematician who was the founder and president of the Quality Education for Minorities (QEM) Network, a nonprofit dedicated to improving minority education. She was the dean for student affairs at the Massachusetts Institute of Technology (MIT) from 1980 to 1990. She was the first African American to receive a Ph.D. from the University of Georgia (UGA) (1966, mathematics). McBay was also the first woman of any race to receive a Ph.D. in mathematics from UGA. McBay was recognized by Mathematically Gifted & Black as a Black History Month 2017 Honoree.

Shirley Ann Mathis was born in Bainbridge, Georgia. She received a B.A. in chemistry from Paine College in 1954, graduating summa cum laude. While also teaching chemistry at Spelman College, McBay earned an M.S. in chemistry (1957) and M.S. in mathematics (1958) from Atlanta University. In 1964, she earned a United Negro College Fund Fellowship, sponsored by the IBM Corporation, that allowed her to study at the University of Georgia and earn a Ph.D. in mathematics in 1966. Her Ph.D. was advised by Thomas Roy Brahana with a dissertation on The Homology Theory of Metabelian Lie Algebras.

McBay spent 15 years at Spelman College as a faculty member and administrator. McBay's leadership at Spelman led to the creation of the division of natural sciences and an increase in an emphasis on the sciences at the institution. She served as chairman of the division until 1975 and as associate academic dean at Spelman from 1973 to 1975. During this time, she created pre-freshman summer programs to increase interest in science majors, which led to the creation of a chemistry department and the renovations of existing science buildings.

She left Spelman in 1975 and took a position at the National Science Foundation for five years. While at the National Science Foundation, she became program director of the Minority Institutions Science Improvement Program. She then worked for ten years at MIT as the dean for student affairs. Thirty months of this time included being the director of the QEM Project, a study of minority education problems. The QEM Project was the impetus for the Quality Education for Minorities (QEM) Network that McBay founded and was president of from 1990 to 2016.

In December 2021, the University of Georgia's Science Library was renamed the Shirley Mathis McBay Science Library in her honor. 

Her husband, chemistry professor Henry C. McBay, died in 1995. The couple had married in 1954. McBay died from complications of diabetes on November 27, 2021, in Los Angeles, at the age of 86. *Wik








DEATHS

1615 Adriaan van Roomen (29 September 1561 – 4 May 1615) One of Roomen's most impressive results was finding π to 16 decimal places. He did this in 1593 using 230 sided polygons. Roomen's interest in π was almost certainly as a result of his friendship with Ludolph van Ceulen.*SAU [van Roomen posed a problem to solve a 45th degree polynomial set equal to a complex square root with another square root inside it (here). Viete solved the equation establishing the use of trigonometry as a tool in algebraic solutions. ] {van Roomen also found a new solution to the classic Problem of Apollonius but it was not a "classic" construction in that it could not be done with only a straightedge and compass. Gergone (see below) found a proof that was constructable with the classic tools.}






1677 Isaac Barrow (Oct 1630, 4 May 1677) died of an overdose of drugs probably opium. Neil Middlemiss ‏pointed out that the original source of this information may be Aubrey's "Brief Lives" wherein he claims, "his pill (an opiate)...he took it excessively at Mr. Wilson's...and 'twas the cause of his death."
 Barrow had taken opiates with fasting previously in Constantinople when suffering from fever. Over dosing on opiates may have been somewhat common in the period, a tweet from   casually mentions another in 1672:" Colwall at Garways. Mr Chamberlain told of Lady Viners death kild by opium."

 Isaac Barrow was an English Christian theologian, and mathematician who is generally given credit for his early role in the development of infinitesimal calculus; in particular, for the discovery of the fundamental theorem of calculus. His work centered on the properties of the tangent; Barrow was the first to calculate the tangents of the kappa curve. Isaac Newton was a student of Barrow's, and Newton went on to develop calculus in a modern form. In 1662 he was made professor of geometry at Gresham College, and in 1663 was selected as the first occupier of the Lucasian chair at Cambridge. During his tenure of this chair he published two mathematical works of great learning and elegance, the first on geometry and the second on optics. In 1669 he resigned his professorship in favor of Isaac Newton . *Wik
I just learned from a tweet from @mathshistory that Barrow was the "first to recognize that integration and differentiation are inverse operations" He is buried in the Chapel at Trinity College.
In geometry, the kappa curve or Gutschoven's curve is a two-dimensional algebraic curve resembling the Greek letter ϰ (kappa). The kappa curve was first studied by Gérard van Gutschoven around 1662. In the history of mathematics, it is remembered as one of the first examples of Isaac Barrow's application of rudimentary calculus methods to determine the tangent of a curve. Isaac Newton and Johann Bernoulli continued the studies of this curve subsequently.








1750 William Morgan, FRS (?26 May 1750– ?4 May 1833: several history sites give different dates for his birth and death, both in old style snd new style.  I picked one pair.) was a Welsh physician, physicist and statistician, who is considered the father of modern actuarial science. He is also credited with being the first to record the "invisible light" produced when a current is passed through a partly evacuated glass tube: "the first x-ray tube".

He won the Copley Medal in 1789, for his two papers on the values of Reversions and Survivorships, printed in the last two volumes of the Philosophical Transactions of the Royal Society, in the field of actuarial science:

"On the Probabilities of Survivorships Between Two Persons of Any Given Ages, and the Method of Determining the Values of Reversions Depending on those Survivorships", 1788–1794

"On the Method of Determining, from the Real Probabilities of Life, the Value of a Contingent Reversion in Which Three Lives are Involved in the Survivorship". Philosophical Transactions of the Royal Society of London, vol. 79 (1789) pp. 40–54

He was elected a Fellow of the Society, in May of the following year.

Advised by Joseph Priestley, a family friend, he developed an interest in scientific experimentation and is credited with being the first to record the "invisible light" produced when a current is passed through a partly evacuated glass tube: "the first x-ray tube"*Wik





1859 Joseph Diaz Gergonne (19 June 1771 Nancy, France—4 May 1859 Montpellier, France)... Finding problems getting his mathematics papers published, Gergonne established his own mathematics journal, the first part appearing in 1810. The Journal was officially called the Annales de mathématiques pures et appliquées but became known as Annales de Gergonne . Gergonne's mathematical interests were in geometry so it is not surprising that it was this topic which figured most prominently in his journal. In fact many famous mathematicians published in the twenty-one volumes of the Annales de Gergonne which appeared during a period of twenty-two years. In addition to Gergonne himself (who published around 200 articles), Poncelet, Servois, Bobillier, Steiner, Plücker, Chasles, Brianchon, Dupin, Lamé, Galois and many others had papers appear in the Journal. Gergonne provided an elegant solution to the Problem of Apollonius in 1816. This problem is to find a circle which touches three given circles. Gergonne introduced the word polar and the principle of duality in projective geometry was one of his main contributions. *SAU




1880 Milan (Rastislav) Stefánik (July 21, 1880 – May 4, 1919) Slovakian astronomer and general who, with Tomás Masaryk and Edvard Benes, from abroad, helped found the new nation of Czechoslovakia by winning much-needed support from the Allied powers for its creation as a post-WWI republic, (1918-19). Before the war, the famous observatory in Meudon near Paris sent a scientific expedition to the 4810m high Mont Blanc. He joined the expedition, which was paid for by the French government to go to the roof of Europe.*TIS



1936 Alfred Cardew Dixon (22 May 1865 in Northallerton, Yorkshire, England - 4 May 1936 in Northwood, Middlesex, England) Alfred Dixon graduated from London and Cambridge and then had professorial appointments in Galway and Belfast. He worked on ordinary and partial differential equations. *SAU
He did early work on Fredholm integrals independently of Fredholm. He worked both on ordinary differential equations and on partial differential equations studying Abelian integrals, automorphic functions, and functional equations.

In 1894 Dixon wrote The Elementary Properties of the Elliptic Functions.





1974 Otton Marcin Nikodym (13 Aug 1887 in Zablotow, Galicia, Austria-Hungary (now Ukraine) - 4 May 1974 in Utica,New York, USA) On 2 April 1919, the Polish Mathematical Society was founded by sixteen mathematicians - among them Otton Nikodym. In 1924, under strong pressure from Sierpinski, Nikodym agreed to take his doctoral examination at Warsaw University. It seems he did not care much for the title or publication - his response to Sierpinski's persuasion was, "Am I going to be any wiser because of that?"
Nikodym's name is mostly known in measure theory (e. g. the Radon-Nikodym theorem and derivative, the Nikodym convergence theorem, the Nikodym-Grothendieck boundedness theorem), in functional analysis (the Radon-Nikodym property of a Banach space, the Frechet-Nikodym metric space, a Nikodym set), projections onto convex sets with applications to Dirichlet problem, generalized solutions of differential equations, descriptive set theory and the foundations of quantum mechanics. *SAU
Otto Nikodym and Stefan Banach Memorial Bench in Kraków, Poland




2001 Anne Anastasi (19 Dec 1908, 4 May 2001 at age 92) American psychologist known as the "test guru," for her pioneering development of psychometrics, the measurement and understanding of psychological traits. Her seminal work, Psychological Testing (1954), remains a classic text in the subject. In it, she drew attention to the ways in which trait development is influenced by education and heredity. She explored how variables in the measurement of those traits include differences in training, culture, and language. In 1972, she became the first woman to be elected president of the American Psychological Association in half a century. For her accomplishments, she was awarded the National Medal of Science in 1987.*TIS






Credits :
*CHM=Computer History Museum
*FFF=Kane, Famous First Facts
*NSEC= NASA Solar Eclipse Calendar
*RMAT= The Renaissance Mathematicus, Thony Christie
*SAU=St Andrews Univ. Math History
*TIA = Today in Astronomy
*TIS= Today in Science History
*VFR = V Frederick Rickey, USMA
*Wik = Wikipedia
*WM = Women of Mathematics, Grinstein & Campbell



Sunday, 3 May 2026

Victorian Political Correctness, Math Terminology, and Urban Legends

    The year 1913 seems to have had a strange effect on educational language, and as yet, I haven't figured out exactly what happened.


A few days ago, Dave Renfro, an internet associate who does more research into journals than anyone I have ever heard of, sent me a note that had an aside that said, "Also, ...,I've seen the terms "promiscuous exercises" and "promiscuous problems".

I did a little follow-up and found literally dozens of books that use the phrase "promiscuous problems". My Google Book search on the exact phrase produced 71 books and journals, mostly referring to mathematics, but not exclusively. In glancing at the dates, I noticed that almost all were before 1900. So I set the same search with a cut-off of before 1900. The result?... There were still 25, but only five of them were after 1910. Of these five, one was about sexual disorders of bulimic patients and had nothing to do with problem sets of the educational sort, one was a catalog of antiquarian objects and was referencing a phrase in an older object, two were reproductions of very old texts. That leaves the one final object after 1910 that referred to Promiscuous exercises in regard to problem sets, with a date of 1911, John Henry Diebel's  Arithmetic by Analysis. For some reason, the usage to describe a set of problems or exercises seems to have disappeared after that date almost completely.




So what do they mean, "promiscuous" problems. One of the definitions leads back to the old Latin root. Here is the way they gave the etymology in the Online Etymology Dictionary:

"consisting of a disorderly mixture of people or things," from L. promiscuus "mixed, indiscriminate," from pro- "forward" + miscere "to mix" (see mix). Meaning "indiscriminate in sexual relations" first recorded 1900, from promiscuity (1849, "indiscriminate mixture;" sexual sense 1865), from Fr. promiscuité, from L. promiscuus.

So the term was essentially used for a general mixture, thus promiscuous exercises were a mixed review; but then in 1900 the phrase became associated with "indiscriminate in sexual relations" and apparently that usage became so common, that the use of promiscuous exercises was no longer classroom acceptable.

Makes me think of a story that John H Conway, told (I believe) about the word hexagon. If you search the word "sexagon" you will see that it was very common in old math texts, then during the Victorian era, it became too suggestive for classroom use, and so hexagon, which also has a long history of use, became the preferred term. The earliest use of Sexagon in English , according to the OED, was by A. Rathborne in Surveyor, written in 1616. The term in English probably came from the use of Latin as the language of choice in science.  Sex was the prefix for six ans still remains in words like sextant, sexagenarian, and sextet.  Its demise may have been due to the hybrid nature of the word, sex from Latin and gon from the Greek for knee.  Hexagon was a union of two 

After I wrote this I got a comment:
r.r. vlorbik said...

i've heard, though never verified, that Victorian prudery also caused certain teachers to begin referring to the "arms" rather than the "legs" of a right triangle (the non-hypotenuse sides).
this is to say nothing of "parent function".i've *always* thought of the higher node of a link in a tree as the "parent' of the lower... so this terminology (in discussion of function transformations; x^2 is the "parent" for 3(x-2)^2 +1... you know the drill...) seems perfectly natural to me.but somebody with some public-school experience told me,what may even be true, that up to a point,
one had called these things *mother* functions. which had to be made to stop.... latus rectum. (wrecked 'em, hell... it killed 'em).


So I was off on another search:

I have a pretty extensive collection of old textbooks, including many British texts, and I didn't remember ever seeing anyone use "arms" in that fashion, so my first thought was that, if it were true, it was only a very minor usage. Since the good lady Victoria, ruled from 1819 to 1901, I thought I would search before and after her reign.

I pulled out my 1804 edition of Playfair's "Elements of Geometry", published in Edinburgh. He referred to the right triangles sides as..."sides"... His Book VI, prop. XXXI reads exactly like the Thomas Heath Translation. No help there, so I skipped forward 99 years to the other end of the Victorian period, 1903 and looked in "A Junior Geometry" by Noel S Lyndon, published in London, only to find he also used only the terms hypotenuse and "other two sides" in his statement of the Pythagorean Thm.

Perhaps neither term was common in the Victorian period, and these stories were a bit of urban legend. I went on to Google Books to see if I could find any examples of geometric usage such as Vlorbik had described..... I entered a search for "arms 'right triangle' geometry"

....Yikes", there they were. The first listing was "Plane Geometry" by Arthur Schultze, Frank Louis Sevenoak, Limond C. Stone, from 1901. It contained, "The sum of the squares of the arms of a right triangle is equal to ..." along with 388 other listings, some dated as late as 2008. "In a right triangle whose arms have lengths a and 6, find the length of the .." appears on page 451 of the fourth edition of Schaum's Outline of Geometry from that year.


 Ok, but that still did not mean it was the influence of the dreaded Victorian stuffed-shirts... I switched the cut-off to 1850... and there were NO results prior to that year... only one last check. Would there be examples with the use of "legs" prior to that year? There were indeed, including several by the famous American Mathematician, Benjamin Pierce. Another from 1734 was from the British Benjamin Martin.

So it appears that there was some pressure to use "arms of a right triangle" suggested by these dates; but there is still no smoking gun. One observation that suggests that if such a suppression existed, it may have been much more influential in the US than in England. One is that the OED gives no reference to the use of arm as a mathematical or geometrical term.  The other is that most of the books  found using "arm" seemed to be of US origin. Does anyone out there know of a document or statement of any kind in the math education literature that makes a clear suggestion to teachers? If you know of such a document, please share whatever level of information you have and I will pursue it.

Functions, Parents, and Parent Functions

From what I have been able to discover in a short period of research, the use of terms like "parent function" seems to have worked its way into mathematics from statistics, which seems to have gotten it from the anthropologists/sociologists.

Across America and Asia: Notes of a Five Years' Journey Around the World ...‎ - Page 250 by Raphael Pumpelly - Voyages around the world - 1870
"if it should bear the same relation to the parent population that.."

Prior to 1900 there are almost no listings of "parent function" in a mathematical usage. Around the end of the 19th century, statisticians began to talk about the distribution from which a sample was taken as the "parent distribution" of the sampling distribution (population of all samples of some size n). Some of these may be related to the study of eugenics in which the study was about the relations of some characteristic of the offspring to the actual parents, but the usage grew.

Data reduction and error analysis for the physical sciences , by Philip R. Bevington - 1969 10-2 the F TEST As discussed in the previous section, the x^2(chi square) test is somewhat ambiguous unless the form of the parent function is known because the statistic
x^2 (chi-sq)... "

Occasionally I find the term "parent function" applied in this way when the distribution of the original sample was a normal distribution.
The Annals of mathematical statistics‎ - Page 179
by American Statistical Association, Institute of Mathematical Statistics, JSTOR (Organization) - 1948
" Usually the parent function is the Type A or normal curve, as discussed by Gram "

There are also some early uses of the "parent function" in association with the use of inverses and derivatives in calculus and analysis texts back to about 1925. By 1970 the term had become commonly understood, but not abundantly used.

The teaching of secondary mathematics‎ - Page 521
by Charles Henry Butler, Frank Lynwood Wren - Education - 1965 - 613 pages

".. of an inverse function and its relation to the parent function or else in failure to attach clear meanings to the terminology and notation employed. ..."

It was the 1980's and the introduction of computers and graphing calculators into modern classrooms that seemed to make the term "parent function" ubiquitous. Any function that appeared on the calculator was a parent function, and the translations, rotations, shears, etc became the "children".
I think this use also led to the introduction of "mother function" rather than the other way around. I can only find a few examples of "mother function" and there does not seem to be any pattern to the frequency as one might expect if a term had arisen to replace this one as an "off-color" predecessor. In fact, it seems "mother function" is more commonly used by continental writers, often in conjunction with "daughter functions"; but admittedly the sample size I have to draw on was small. Perhaps these were early pioneers for language equality.

If you are one of those people with access to old journals, or a collection of old texts, I would appreciate any references to the use of any of these terms and a source earlier than 1900; and if you have a way to make a digital copy and send it by email, I will have my students name their children after you.  



On This Day in Math - May 3

 



We by art gain mastery over things which we are conquered by Nature

quotation from Antiphon which on the title page of John Wilkins' Mathematical Magick



The 123rd day of this year; The number formed by the concatenation of odd numbers from 123 down to 1 is prime. (ie 123121119...531 is Prime) *Prime Curios (Who figures stuff like this out???)

Japan Airlines Flight 123, was the world's deadliest single-aircraft accident in history


and 123 might remind you that ln(1) + ln(2) + ln(3) = ln (1 + 2 + 3 )

And here is an interesting curiosity from the archimedes-lab.org/numbers file:
Write down any number (excluding the digit 0):
64861287124425928
Now, count up the number of even and odd digits, and the total number of digits it contains, as follows:
12 | 5 | 17
Then, string those 3 numbers together to make a new number, and perform the same operation on that:
12517
1 | 4 | 5
Keep iterating:
145
1 | 2 | 3
You will always arrive at 123.   
Maybe not always !  A comment pointed out that if all the digits are odd, or all even, it doesn't work

And 123 is the difference of two squares in two different ways, 62² - 61² and 22² - 19².  The pattern of both these are explained in Day 111.  at Math Day of the Year Facts: Number Facts for Every Year Day (91-120) (mathdaypballew.blogspot.com)



EVENTS

1375 BC, the oldest recorded eclipse occurred, according to one plausible interpretation of a date inscribed on a clay tablet retrieved from the ancient city of Ugarit, Syria (as it is now). This date is one of two plausible dates usually cited from the record, though 5 Mar 1223 is the more favoured date by most recent authors on the subject. Certainly by the 8th century BC, the Babylonians were keeping a systematic record of solar eclipses, and possibly by this time they may have been able to apply meteorological rules to make fairly accurate predictions of the occurrence of solar eclipses. The first total solar eclipse reliably recorded by the Chinese occurred on 4 Jun 180 *TIS
(A new historical dating of the tablet, and mention in the text of the visibility of the planet Mars during the eclipse as well as the month in which it occurred enables us to show that the recorded eclipse in fact occurred on 5 March 1223 BC. This new date implies that the secular deceleration of the Earth's rotation has changed very little during the past 3,000 years. *nature.com) With thanks to Bill Thayer ‏@LacusCurtius




1661 Equipment used by Hevelius with a telescope to project an astronomical image onto a sheet of paper. This arrangement was used in his historic observation of the transit of Mercury on May 3, 1661. His surviving books are filled with great images by himself and his second wife, Elisabeth Koopman whom he would marry two years after this transit. * Maria Popova at brainpickings.org
This was the first observation of a transit of Mercury in the Month of May. The two previous transits had both been in November in 1631 and 1651. This observation was visible in London and occurred on the day of the Coronation of King Charles II . It was observed by Christiaan Huygens in London. *Wik






1715 May 3 A total solar eclipse was observed in England from Cornwall in the south-west to Lincolnshire and Norfolk in the east. This eclipse is known as Halley's Eclipse, after Edmund Halley (1656–1742) who predicted this eclipse to within 4 minutes accuracy. Halley observed the eclipse from London where the city of London enjoyed 3 minutes 33 seconds of totality. He also drew a predictive map showing the path of totality across England. The original map was about 30 km off the observed eclipse path. After the eclipse, he corrected the eclipse path, and added the path and description of the 1724 total solar eclipse.Note: Great Britain didn't adopt the Gregorian calendar until 1752, so the date was considered 22 April 1715. *Wik… The Royal Society reports: Edmund Halley, a Fellow of the Royal Society, is most famous for his work on the orbits of comets, predicting when the one that now bears his name would be seen; however, his interests were more widespread. In 1715 the first total solar eclipse for 500 years took place over England and Wales. Halley, a talented mathematician, realized that such an event would generate a general curiosity and requested that the ‘curious’ across the country should observe ‘what they could’ and make a record of the time and duration of the eclipse. At the time, there were only two universities in England and their astronomy professors did not have much luck in observing the event: ‘the Reverend Mr Cotes at Cambridge had the misfortune to be oppressed by too much company’ and ‘Dr John Keill by reason of clouds, saw nothing distinctly at Oxford but the end’. The event did indeed capture the imagination of the nation and the timings collected allowed Halley to work out the shape of the eclipse shadow and the speed at which it passed over the Earth (29 miles per minute).




1834 In response to a letter from William Whewell at Cambridge suggesting the names "anode" and "cathode"; Faraday says ,"All your names I and my friend approve of or nearly all as to sense & expression, but I am frightened by their length & sound when compounded. As you will see I have taken deoxide and skaiode because they agree best with my natural standard East and West. I like Anode & Cathode better as to sound, but all to whom I have shewn them have supposed at first that by Anode I meant No way." (within a few weeks he would change his mind about using the two terms, see 15 may, 1834)
Whewell's original letter is (or was) on display at Wren Library at Trinity College Cambridge.





1841 L. G. J. Jacobi, who made a lengthy study of Euler’s and d’Alembert’s works, wrote “It is worth noting that it is impossible today to choke down a single line of d’Alembert’s mathematics, while most of Euler’s works can be read with delight, and they died in the same year [1783]. D’Alembert seems to have been entirely absorbed in belles-lettres.” [Hawkins, Jean D’Alembert, p 63]. *VFR


1849 Arthur Cayley called to the Bar. He abandoned his fellowship at Cambridge and took up law as he didn’t want to take Holy Orders. During his 14 years at the bar he wrote nearly 300 mathematical papers. *VFR


1902 The San Francisco Section of the AMS was founded at a gathering of twenty mathematicians at the Academy of Sciences, San Francisco, CA. [AMS Semicentennial Publications, vol 1, p 8].

1934 Henri-Leon Lebesgue elected foreign member of the Royal Society. From 1899 until 1903 he taught at the Lyc´ee at Nancy, France, where he wrote his famous doctoral thesis “Int´egrale, longueur, aire,” which proposed a now standard extension of the Riemann integral. See The Mathematical Intelligencer, 6(1984), no. 2, p. 8. *VFR





1984 Dell Computer Corporation is founded by Michael Dell, running the direct-to-order PC company from his dorm room. Using this innovative direct-to-order model, Dell, Inc. eventually became the largest manufacturer of PCs in the world for many years. Through ups and downs, it is still currently in the top 3 as of 2022 in market share for personal computers.*This Day in Tech History






1997 Garry Kasparov beat IBM's Deep Blue in the first match of what many considered a test of artificial intelligence. The world's best chess player, Kasparov eventually lost the match and $1.1 million purse to the IBM supercomputer, which he had claimed could never surpass human chess ability. After losing the sixth and final game of the match, Kasparov accused IBM of building a machine specifically to beat him. Observers said he was frustrated by Deep Blue's quickness although they expected him to win with unconventional moves. *CHM On February 10, 1996, Deep Blue became the first machine to win a chess game against a reigning world champion (Garry Kasparov) under regular time controls. However, Kasparov won three and drew two of the following five games, beating Deep Blue by a score of 4–2 (wins count 1 point, draws count ½ point). The match concluded on February 17, 1996.
Deep Blue was then heavily upgraded (unofficially nicknamed "Deeper Blue") and played Kasparov again in May 1997, winning the six-game rematch 3½–2½, ending on May 11. *Wik



2016 Three computer scientists have announced the largest-ever mathematics proof: a file that comes in at a whopping 200 terabytes, roughly equivalent to all the digitized text held by the US Library of Congress. The researchers have created a 68-gigabyte compressed version of their solution — which would allow anyone with about 30,000 hours of spare processor time to download, reconstruct and verify it — but a human could never hope to read through it.
Computer-assisted proofs too large to be directly verifiable by humans have become commonplace, and mathematicians are familiar with computers that solve problems in combinatorics — the study of finite discrete structures — by checking through umpteen individual cases. Still, “200 terabytes is unbelievable”, says Ronald Graham, a mathematician at the University of California, San Diego. The previous record-holder is thought to be a 13-gigabyte proof2, published in 2014.
The puzzle that required the 200-terabyte proof, called the Boolean Pythagorean triples problem, has eluded mathematicians for decades. In the 1980s, Graham offered a prize of US$100 for anyone who could solve it. (He duly presented the cheque to one of the three computer scientists, Marijn Heule of the University of Texas at Austin, earlier this month.) The problem asks whether it is possible to colour each positive integer either red or blue, so that no trio of integers a, b and c that satisfy Pythagoras’ famous equation a^2 + b^2 = c^2 are all the same colour. For example, for the Pythagorean triple 3, 4 and 5, if 3 and 5 were coloured blue, 4 would have to be red.
In a paper posted on the arXiv server on 3 May, Heule, Oliver Kullmann of Swansea University, UK, and Victor Marek of the University of Kentucky in Lexington have now shown that there are many allowable ways to colour the integers up to 7,824 — but when you reach 7,825, it is impossible for every Pythagorean triple to be multicoloured. There are more than 102,300 ways to colour the integers up to 7,825, but the researchers took advantage of symmetries and several techniques from number theory to reduce the total number of possibilities that the computer had to check to just under 1 trillion. It took the team about 2 days running 800 processors in parallel on the University of Texas’s Stampede supercomputer to zip through all the possibilities. The researchers then verified the proof using another computer program. *Evelyn Lamb, nature.com
The proof was vdone on Un of Texas Stampede Super Computer




BIRTHS

1695 Henri Pitot (3 May 1695; 27 Dec 1771 at age 76) French hydraulic engineer who invented the Pitot tube (1732), an instrument to measure flow velocity either in liquids or gases. With subsequent improvements by Henri Darcy, its modern form is used to determine the airspeed of aircraft. Although originally a trained mathematician and astronomer, he became involved with an investigation of the velocity of flowing water at different depths, for which purpose he first created the Pitot tube. He disproved the prevailing belief that the velocity of flowing water increased with depth. Pitot became an engineer in charge of maintenance and construction of canals, bridges, drainage projects, and is particularly remembered for his kilometer-long Roman-arched Saint-Clément Aqueduct (1772) at Montpellier, France.*TIS



========================================================
1860 Vito Volterra (3 May 1860 – 11 October 1940) was an Italian mathematician and physicist, known for his contributions to mathematical biology and integral equations.In 1922, he joined the opposition to the Fascist regime of Benito Mussolini and in 1931 he was one of only 12 out of 1,250 professors who refused to take a mandatory oath of loyalty. His political philosophy can be seen from a postcard he sent in the 1930s, on which he wrote what can be seen as an epitaph for Mussolini’s Italy: Empires die, but Euclid’s theorems keep their youth forever. However, Volterra was no radical firebrand; he might have been equally appalled if the leftist opposition to Mussolini had come to power, since he was a lifelong royalist and nationalist. As a result of his refusal to sign the oath of allegiance to the fascist government he was compelled to resign his university post and his membership of scientific academies, and, during the following years, he lived largely abroad, returning to Rome just before his death.*Wik
André WEIL spent 1925-1926 studying with Volterra. Volterra was President of the the ACCADEMIA DEI LINCEI (or Lyncei). This was the first modern learned society. It was founded in Rome by Prince Federigo Cesi in 1603. The word 'lincei' means 'lynx-eyed', but actually derives from the Greek argonaut Linkeus, the eponym of the animal. Lynxes are on the crest of the Accademia.


A large and important branch of mathematics, now called Volterra Integral Equations, was originated by him, especially those of the first type. *G Donald Allen

*SAU



1874 V(agn) Walfrid Ekman (3 May 1874, 9 Mar 1954 at age 79) Swedish physical oceanographer and mathematical physicist whose research into the dynamics of ocean currents led to his name remaining associated with terms for particular phenomena of the ocean or atmosphere, including Ekman spiral, Ekman transport and Ekman layer. Fridtjof Nansen pointed out to Ekman that he had noticed that icebergs drift at an angle of 20°-40° to the prevailing wind, rather than directly with the wind. In 1902, Ekman published an explanation, known now as the Ekman spiral, describing movement of ocean currents influenced by the Earth's rotation. He also developed experimental techniques and instruments such as the Ekman current meter and Ekman water bottle.*TIS




1892 Sir George Paget Thomson
 (3 May 1892; 10 Sep 1975 at age 83) English physicist who shared (with Clinton J. Davisson of the U.S.) the Nobel Prize for Physics in 1937 for demonstrating that electrons undergo diffraction, a behavior peculiar to waves that is widely exploited in determining the atomic structure of solids and liquids. He was the son of Sir J.J. Thomson who discovered the electron as a particle. *TIS



1902 Alfred Kastler (3 May 1902; 7 Jan 1984 at age 81) French physicist who won the Nobel Prize for Physics in 1966 for his discovery and development of methods for observing Hertzian resonances within atoms. This research facilitated the greater understanding of the structure of the atom by studying the radiations that atoms emit when excited by light and radio waves. He developed a method called "optical pumping" which caused atoms in a sample substance to enter higher energy states. This idea was an important predecessor to the development of masers and the lasers which utilized the light energy that was re-emitted when excited atoms released the extra energy obtained from optical pumping. *TIS



1924 Isadore Manuel Singer (May 3, 1924 – February 11, 2021), Detroit Michigan. "Singer is justifiably famous among mathematicians for his deep and spectacular work in geometry, analysis, and topology, culminating in the Atiyah-Singer Index theorem and its many ramifications in modern mathematics and quantum physics." *SAU  

Singer is noted for his work with Michael Atiyah, proving the Atiyah–Singer index theorem in 1962, which paved the way for new interactions between pure mathematics and theoretical physics. In early 1980s, while a professor at Berkeley, Singer co-founded the Mathematical Sciences Research Institute (MSRI) with Shiing-Shen Chern and Calvin Moore



1933 Steven Weinberg (May 3, 1933 – July 23, 2021) American nuclear physicist who shared the 1979 Nobel Prize for Physics (with Sheldon Lee Glashow and Abdus Salam) for work in formulating the electroweak theory, which explains the unity of electromagnetism with the weak nuclear force. *TIS





DEATHS

1657 Johann Baptist Cysat 
(1586, 3 May 1657), Latinized as Cysatus was a Swiss astronomer who entered the Jesuit order (1604), and by 1611 was studying at the Jesuit college in Ingolstadt, Bavaria, under Christoph Scheiner, whom he assisted in the observation of sunspots. From 1618, he taught mathematics there. As an early user of a telescope, he was the first to make substantial telescopic observation of a comet (1 Dec 1618 to 22 Jan 1619), Although he discovered the Orion Nebula independently (1619), it had been first noted by Peiresc in 1610. Cysat wrote to Kepler describing a lunar eclipse (1620) and observed the transit of Mercury (1631). It is the comet study for which Cysat is noted. His measurements of its position were made using a 6-foot radius wooden sextant. He published his data and analysis in an 80-page booklet, Mathemata astronomica de locu...cometae... (1619). *TIS



1764 Francesco Algarotti (11 Dec 1712, 3 May 1764 at age 51) Italian scholar of the arts and sciences, recognized for his wide knowledge and elegant presentation of advanced ideas. At age 21, he wrote Il Newtonianismo per le dame (1737; "Newtonianism for Ladies"), a popular exposition of Newtonian optics. He also wrote about architecture, opera and painting. *TIS
He was an Italian polymath, philosopher, poet, essayist, anglophile, art critic and art collector. He was a man of broad knowledge, an expert in Newtonianism, architecture and opera. He was a friend of Frederick the Great and leading authors of his times: Voltaire, Jean-Baptiste de Boyer, Marquis d'Argens, Pierre-Louis de Maupertuis and the atheist Julien Offray de La Mettrie. Lord Chesterfield, Thomas Gray, George Lyttelton, Thomas Hollis, Metastasio, Benedict XIV and Heinrich von Brühl were among his correspondents. *Wik




1779 John Winthrop (December 19, 1714 – May 3, 1779) was the 2nd Hollis Professor of Mathematics and Natural Philosophy in Harvard College. He was a distinguished mathematician, physicist and astronomer, born in Boston, Mass. His great-great-grandfather, also named John Winthrop, was founder of the Massachusetts Bay Colony. He graduated in 1732 from Harvard, where, from 1738 until his death he served as professor of mathematics and natural philosophy. Professor Winthrop was one of the foremost men of science in America during the 18th century, and his impact on its early advance in New England was particularly significant. Both Benjamin Franklin and Benjamin Thompson (Count Rumford) probably owed much of their early interest in scientific research to his influence. He also had a decisive influence in the early philosophical education of John Adams, during the latter's time at Harvard. He corresponded regularly with the Royal Society in London—as such, one of the first American intellectuals of his time to be taken seriously in Europe. He was noted for attempting to explain the great Lisbon earthquake of 1755 as a scientific—rather than religious—phenomenon, and his application of mathematical computations to earthquake activity following the great quake has formed the basis of the claim made on his behalf as the founder of the science of seismology. Additionally, he observed the transits of Mercury in 1740 and 1761 and journeyed to Newfoundland to observe a transit of Venus. He traveled in a ship provided by the Province of Massachusetts - probably the first scientific expedition ever sent out by any incipient American state. *Wik



1880 Jonathan Homer Lane (August 9, 1819, Geneseo, New York – May 3, 1880, Washington D.C.) U.S. astrophysicist who was the first to investigate mathematically the Sun as a gaseous body. His work demonstrated the interrelationships of pressure, temperature, and density inside the Sun and was fundamental to the emergence of modern theories of stellar evolution. *TIS Simon Newcomb, in his memoirs, describes Lane as "an odd-looking and odd-mannered little man, rather intellectual in appearance, who listened attentively to what others said, but who, so far as I noticed, never said a word himself." Newcomb recounts his own role in bringing Lane's work, in 1876, to the attention of William Thomson who further popularized the work. Newcomb notes, "it is very singular that a man of such acuteness never achieved anything else of significance." *Wik



1885 Ernst Ferdinand Adolf Minding (23 Jan 1806 in Kalisz,Russian Empire (now Poland) - 3 May 1885 in Dorpat, Russia (now Tartu, Estonia)) His work, which continued Gauss's study of 1828 on the differential geometry of surfaces, greatly influenced Peterson.  Minding published on the problem of the shortest closed curve on a given surface enclosing a given area. He introduced the geodesic curvature although he did not use the term which was due to Bonnet who discovered it independently in 1848. In fact Gauss had proved these results, before either Minding or Bonnet, in 1825 but he had not published them.
Minding also studied the bending of surfaces proving what is today called Minding's theorem in 1839. The following year he published in Crelle's Journal a paper giving results about trigonometric formulae on surfaces of constant curvature. Lobachevsky had published, also in Crelle's Journal, related results three years earlier and these results by Lobachevsky and Minding formed the basis of Beltrami's interpretation of hyperbolic geometry in 1868.
Minding also worked on differential equations, algebraic functions, continued fractions and analytic mechanics. In differential equations he used integrating factor methods. This work won Minding the Demidov prize of the St Petersburg Academy in 1861. It was further developed by A N Korkin. Darboux and Émile Picard pushed these results still further in 1878. *SAU






1928 Jacques-Louis Lions (3 May 1928 – 17 May 2001) was a French mathematician who made contributions to the theory of partial differential equations and to stochastic control, among other areas. He received the SIAM's John Von Neumann prize in 1986. Lions is listed as an ISI highly cited researcher. Lions was elected President of the International Mathematical Union in 1991 and also received the Prize of Japan that same year. In 1992, the University of Houston awarded him an honorary doctoral degree. He was elected president of the French Academy of Sciences in 1996. He has left a considerable body of work, among this more than 400 scientific articles, 20 volumes of mathematics that were translated into English and Russian, and major contributions to several collective works, including the 4000 pages of the monumental Mathematical analysis and numerical methods for science and technology (in collaboration with Robert Dautray), as well as the Handbook of numerical analysis in 7 volumes (with Philippe G. Ciarlet).
His son Pierre-Louis Lions is also a well-known mathematician who was awarded a Fields Medal in 1994.*Wik



1988 Lev Semenovich Pontryagin (3 September 1908 – 3 May 1988) One of the 23 problems posed by Hilbert in 1900 was to prove his conjecture that any locally Euclidean topological group can be given the structure of an analytic manifold so as to become a Lie group. This became known as Hilbert's Fifth Problem. In 1929 von Neumann, using integration on general compact groups which he had introduced, was able to solve Hilbert's Fifth Problem for compact groups. In 1934 Pontryagin was able to prove Hilbert's Fifth Problem for abelian groups using the theory of characters on locally compact abelian groups which he had introduced. *SAU [He was buried at the Novodevichie Memorial Cemetery in Moscow.]
Alexandre Zagoskin commented, "Lev Pontryagin completely lost his sight at the age of 14 due to an accident and was then helped by his schoolmates and his mother, who read to him the textbooks. His mother learned German to read him research papers when he studied at the university."   





1988 Abraham Seidenberg (June 2, 1916 – May 3, 1988) was an American mathematician. He was known for his research to commutative algebra, algebraic geometry, differential algebra, and the history of mathematics. He published Prime ideals and integral dependence written jointly with I S Cohen which greatly simplified the existing proofs of the going-up and going-down theorems of ideal theory. He also made important contributions to algebraic geometry. In 1950, he published a paper called The hyperplane sections of normal varieties which has proved fundamental in later advances. In 1968, he wrote Elements of the theory of algebraic curves, a book on algebraic geometry. He published several important papers.*Wik



2019 Gorō Shimura (23 February 1930 – 3 May 2019) was a Japanese mathematician and Michael Henry Strater Professor Emeritus of Mathematics at Princeton University who worked in number theory, automorphic forms, and arithmetic geometry. He was known for developing the theory of complex multiplication of abelian varieties and Shimura varieties, as well as posing the Taniyama–Shimura conjecture which ultimately led to the proof of Fermat's Last Theorem.

Gorō Shimura was born in Hamamatsu, Japan, on 23 February 1930.[2] Shimura graduated with a B.A. in mathematics and a D.Sc. in mathematics from the University of Tokyo in 1952 and 1958, respectively.

After graduating, Shimura became a lecturer at the University of Tokyo, then worked abroad — including ten months in Paris and a seven-month stint at Princeton's Institute for Advanced Study — before returning to Tokyo, where he married Chikako Ishiguro. He then moved from Tokyo to join the faculty of Osaka University, but growing unhappy with his funding situation, he decided to seek employment in the United States.[4][2] Through André Weil he obtained a position at Princeton University. Shimura joined the Princeton faculty in 1964 and retired in 1999, during which time he advised over 28 doctoral students and received the Guggenheim Fellowship in 1970, the Cole Prize for number theory in 1977, the Asahi Prize in 1991, and the Steele Prize for lifetime achievement in 1996.

Shimura described his approach to mathematics as "phenomenological": his interest was in finding new types of interesting behavior in the theory of automorphic forms. He also argued for a "romantic" approach, something he found lacking in the younger generation of mathematicians. Shimura used a two-part process for research, using one desk in his home dedicated to working on new research in the mornings and a second desk for perfecting papers in the afternoon.

Shimura had two children, Tomoko and Haru, with his wife Chikako. Shimura died on 3 May 2019 in Princeton, New Jersey at the age of 89.

Shimura was a colleague and a friend of Yutaka Taniyama, with whom he wrote the first book on the complex multiplication of abelian varieties and formulated the Taniyama–Shimura conjecture. Shimura then wrote a long series of major papers, extending the phenomena found in the theory of complex multiplication of elliptic curves and the theory of modular forms to higher dimensions (e.g. Shimura varieties). This work provided examples for which the equivalence between motivic and automorphic L-functions postulated in the Langlands program could be tested: automorphic forms realized in the cohomology of a Shimura variety have a construction that attaches Galois representations to them. *Wik




2023  Victoria Ruth Neale (March 1984 – 3 May 2023) was a British mathematician and writer. She was Whitehead Lecturer at Oxford's Mathematical Institute and Supernumerary Fellow at Balliol College. Her research specialty was number theory. The author of the 2017 book Closing the Gap: The Quest to Understand Prime Numbers, she was interviewed on several BBC radio programs as a mathematics expert. In addition, she wrote for The Conversation and The Guardian Her other educational and outreach activities included lecturing at the PROMYS Europe high-school programs and helping to organize the European Girls' Mathematical Olympiad.

Neale was born in 1984. She obtained her PhD in 2011 from the University of Cambridge. Her thesis work, supervised by Ben Joseph Green, concerned Waring's problem. She then taught at Cambridge while being Director of Studies in mathematics at Murray Edwards College, before moving to Oxford in the summer of 2014.

Neale died on 3 May 2023, at the age of 39. She had been diagnosed with a rare type of cancer in 2021.









Credits :
*CHM=Computer History Museum
*FFF=Kane, Famous First Facts
*NSEC= NASA Solar Eclipse Calendar
*RMAT= The Renaissance Mathematicus, Thony Christie
*SAU=St Andrews Univ. Math History
*TIA = Today in Astronomy
*TIS= Today in Science History
*VFR = V Frederick Rickey, USMA
*Wik = Wikipedia
*WM = Women of Mathematics, Grinstein & Campbell