Thursday, 3 September 2026

On This Day in Math - October 29

   




Allez en avant, et la foi vous viendra
Push on and faith will catch up with you.

~Jean d'Alembert [advice to those who questioned the calculus](probably also great for students struggling with mathematics at any level)


The 302nd day of the year; There are 302 ways to play the first three moves in checkers.

302 is the sum of three consecutive squares 92+102+112  

302 is a semiprime, 2 x 151.  Its reversal 203 = 7 x 29, is also a semiprime



EVENTS


1669 Newton, aged twenty-six, appointed Lucasian Professor at Cambridge. This post required Newton to lecture once each week on “some part of Geometry, Astronomy, Geography, Optics, Statics, or some other Mathematical discipline,” and to deposit ten of those lectures in the library each year. The students were required to attend, but like all other requirements they ignored this one too. We know of only three people who attended a lecture at Cambridge by Newton. [Westfall 208–210; Works, 3, xv] *VFR

The post was founded in 1663 by Henry Lucas, who was Cambridge University's Member of Parliament in 1639–1640, and it was officially established by King Charles II on 18 January 1664. It was described by The Daily Telegraph as one of the most prestigious academic posts in the world. Since its establishment, the professorship has been held by, among others, Isaac Newton, Charles Babbage, George Stokes, Joseph Larmor, Paul Dirac, and Stephen Hawking.

Michael Elmhirst Cates FRS FRSE HonFInstP  is the 19th Lucasian Professor of Mathematics at the University of Cambridge and has held this position since 1 July 2015. He was previously Professor of Natural Philosophy at the University of Edinburgh, and has held a Royal Society Research Professorship since 2007. His work focuses on the theory of soft matter, such as polymers, colloids, gels, liquid crystals, and granular material.

The First Lucasian Professor at Cambridge was Isaac Barrow

Statue of Isaac Barrow in the chapel of 
Trinity College, Cambridge*Wik



1675 Leibniz first used the integral sign. Also first used “d”. He also constructed what he calls the “triangulum characteristicum,” which had been used before him by Pascal and Barrow. [Cajori, History of Mathematical Notations, vol. 2, p. 2; Struik’s Source Book mistakenly has 26 October]

VFR Historical notes for the calculus classroom ,
In these same pages he will write examples of the integrals of x2 and x3,and then illustrate that a constant multiple may be taken outside the integral as shown in the image below.

On the left is Liebniz integral sign with a vincula in place of todays parentheses to show that he is integrating the quantity (a/b) l   Then the open bottomed box is Liebniz symbol for equality,then he shows the constant (a/b) multiplied by the integral of l .

At this point, Leibniz does not include the dx, as in \( \int x^2 = \frac{x^3}{3} \)  even though it seems his definition of an integral as a summation would seem to require it.  By 1686 he will adopt it, as he wrote \( \int \rho dx \)


1745/46 The first Polish encyclopedia, titled Nowe Ateny, or “New Athens,” was published.  It differed greatly in style from the encyclopedias of today. It included entries for dragons, headless humans, and an ant that could eat a pound of meat. The author had little time for mundane entries like “horse,” whose description was simply “What a horse is like, anyone can see.” *Britannica





1856 William Rowan Hamilton submits a paper on "New Roots of Unity" which will be the foundation of his Icosian Calculus, and the Icosagon game he used as a simplification of the operations of the group. The symbols of the icosian calculus can be equated to moves between vertices on a dodecahedron. Hamilton’s work in this area resulted indirectly in the terms Hamiltonian circuit and Hamiltonian path in graph theory. *Wik
The game set shown below included numbered pegs that could track your path around the twenty vertices of the dodecahedron


1878 Patent issued for Odhner calculating machine. *VFR Willigot T. Odhner was granted a patent for a calculating machine that performed multiplications by repeated additions. The patent, a modified and compact version of Gottfried von Leibniz stepped wheel, was acquired and embodied in Brunsviga calculators that sold into 1950s.*CHM





1929 "Black Tuesday", the great USA stock market crash. About 16 million shares were traded, and the Dow lost an additional 30 points, or 12%.. "Anyone who bought stocks in mid-1929 and held onto them saw most of his or her adult life pass by before getting back to even." Richard M. Salsman *Wik

 In fact it wasn't until October of 1954 before it regained its 1929 High,  The Dow Jones Industrial Average dropped significantly from a high of around 381 in September 1929 to a low of 41.22 in July 1932, losing nearly 90% of its value during the 1929 crash and subsequent Great Depression. After reaching this low point, it gradually began to recover, peaking again in 1937 before experiencing another sharp decline in 1937-1938. By 1940, the index had not yet returned to its 1929 peak but was on an upward trend, finishing the year around 150.




1964 Asteroid "Lucifer" is discovered by astronomer Elizabeth Roemer. amhistorymuseum ‏@amhistorymuseum Roemer was the winner of the 1946  National Westinghouse Science Talent Search, and became Professor Emerita, Lunar and Planetary Laboratory, University of Arizona. *Smithsonian Institution Archives (Ok, it's pure trivia, but is she somehow related to Ole, who first measured the speed of light???)

Elizabeth Roemer was an active member of the astronomy community until her death in 2016. She became a member of the Friends of Lowell Observatory in 2006, as well as a member of the Percival Lowell Society.

1930 Lucifer, provisional designation 1964 UA, is a carbonaceous asteroid from the outer regions of the asteroid belt, approximately 34 kilometers in diameter. It was discovered on 29 October 1964, by American astronomer Elizabeth Roemer at the Flagstaff station (NOFS) of the United States Naval Observatory (USNO). It is named after Lucifer, the "shining one" or "light-bearer" from the Hebrew Bible.




1985 On October 29th, 1985, the 329th birthday of Edmond Halley, the British threw a big party in honor of the return of Halley's Comet. The Halley's Comet Royal Gala was held at Wembley Conference Centre, London. It was a combination Variety Show and "Who's Who" in British Society, hosted by Princess Anne of the British Royal Family. *Joseph M. Laufer, Halley's Comet Society, USA

Halley's Comet was approaching Earth in 1985, making the 1985-86 apparition the most significant for centuries and the subject of major scientific and public interest. During this time, ground-based telescopes and several spacecraft, including the European Space Agency's Giotto probe, were deployed for close-up studies, though the comet's closest approach to Earth was in April 1986. Halley's Comet was last visible from Earth in 1986 and is not expected to return until 2061.  *PB

TIME Magazine Cover: Halley's Comet - Dec. 16, 1985 




In 1991, space probe Galileo become the first human object to fly past an asteroid, Gaspra, making its closest approach at a distance of 1,604 km, passing at a speed of 8 km/sec (5 mi/sec). The encounter provided much data, including 150 images, which showed Gaspra has numerous craters indicating it has suffered numerous collisions since its formation. Gaspra is about 20-km long and orbits the Sun in the main asteroid belt between Mars and Jupiter. Gaspra, asteroid 951, was discovered by Ukrainian astronomer Grigoriy N. Neujamin (1916) who named it after a Black Sea retreat. In the photograph, subtle color variations have been exaggerated by NASA to highlight changes in reflectivity, surface structure and composition. *TIS



1998, Nearly four decades after he became the first American to orbit Earth, John Glenn is relaunched into space. *@HISTORYmag

 Nearly four decades after his famous orbital flight, the 77-year-old Glenn became the oldest human ever to travel in space. During the nine-day mission, he served as part of a NASA study on health problems associated with aging.



On Oct. 29, 1998, the gavel came down at the auction of an ugly-looking medieval manuscript (first image above). Splotched with mildew, displaying a Greek prayer book of no special interest, the codex appeared to have little going for it except its age, which was 13th century. But one important feature had brought bidders from around the globe and on the phone to Christie’s in New York: the manuscript was a palimpsest, which means the parchment had been scraped and reused, and there was another text, several centuries older and only faintly visible, lying under the prayer text. That "other text" proved to be a collection of seven of the works of Archimedes, in Greek, including a treatise, "The Method," for which no other copy exists.

The Archimedes palimpsest first came to light in 1906, when Johan Heiberg, a scholar of ancient Greek mathematics, had examined it in Constantinople and recognized the underlying script as Archimedean. The manuscript subsequently turned up in the library of a French collector, then disappeared for 75 years, and then emerged again in 1998, when Christie’s offered it up at auction (second image). When the gavel dropped, the winning bid was an even $2 million (with another $200,000 in premiums added on top). *Linda Hall Org






BIRTHS

1897 Edwin James George Pitman  (29 October 1897 – 21 July 1993)  was born in Melbourne on 29 October 1897 and died at Kingston near Hobart on 21 July 1993.  In 1920 he completed the degree course and graduated B.A. (1921), B.Sc. (1922) and M.A. (1923). In the meantime he was appointed Acting Professor of Mathematics at Canterbury College, University of New Zealand (1922-23). He returned to Australia when appointed Tutor in Mathematics and Physics at Trinity and Ormond Colleges and Part-time Lecturer in Physics at the University of Melbourne (1924-25). In 1926 Pitman was appointed Professor of Mathematics at the University of Tasmania, a position he held until his retirement in 1962.
Pitman described himself as 'a mathematician who strayed into Statistics'; nevertheless, his contributions to statistical and probability theory were substantial.
Pitman was active in the formation of the Australian Mathematical Society in 1956. He also took an active part in the Summer Research Institutes organized by the Mathematical Society, and used them as a sounding board for his research on statistical inference.
He was a renowned member of the Statistical Society of Australia, attending its biennial conferences. In 1978 the Statistical society established the Pitman Medal.
Pitman presented the first systematic account of non-parametric inference and lectured extensively on the subject, both in Australia and in the United States. The kernel of the subject, as described by him, is 'Suppose that the sum of two samples A, B is the sample C. Then A, B are discordant if A is an unlikely sample from C.' Again, he writes, 'The approach to the subject, starting from the sample and working towards the population instead of the reverse, may be a bit of a novelty'; and later, 'the essential point of the method is that we do not have to worry about the populations which we do not know, but only about the sample values which we do know'.
The notes of the 'Lectures on Non-parametric Inference' given in the United States, though never published, have been widely circulated and have had a major impact on the development of the subject. Among the new concepts introduced in these Lectures are asymptotic power, efficacy, and asymptotic relative efficiency.
A major contribution to probability theory is his elegant treatment of the behavior of the characteristic function in the neighborhood of the origin, in three papers. This governs such properties as the existence of moments. There are also interesting properties of the Cauchy distribution, and of subexponential distributions.
On his death, on 21 July 1993, Edwin was buried at the Hobart Regional Cemetery in Kingston. He lives on in the memory of many of us who are grateful for his life and legacy.
*Evan J. Williams, Australian Academy of Science




1910 Dan Pedoe (29 October 1910, London – 27 October 1998, St Paul, Minnesota, USA) was an English-born mathematician and geometer with a career spanning more than sixty years. In the course of his life he wrote approximately fifty research and expository papers in geometry. He is also the author of various core books on mathematics and geometry some of which have remained in print for decades and been translated into several languages. These books include the three-volume Methods of Algebraic Geometry (which he wrote in collaboration with W. V. D. Hodge), The Gentle Art of Mathematics, Circles: A Mathematical View, Geometry and the Visual Arts and most recently Japanese Temple Geometry Problems: San Gaku (with Hidetoshi Fukagawa). *Wik   [His book on San Gaku is one of the most beautiful math books I have ever owned.  Many of the temple plaques are the work of working peasants who learned and created beautiful geometric works as offerings to the gods. Soddy's hexlet, thought previously to have been discovered in the west in 1937, had been discovered on a sangaku dating from 1822.]

Replica of Sangaku at Hōtoku museum in Samukawa Shrine.




1925 Nathan Joseph Harry Divinsky (October 29, 1925 – June 17, 2012) was a Canadian mathematician, university professor, chess master, chess writer, and chess official. Divinsky was also known for being the former husband of the 19th prime minister of Canada, Kim Campbell. Divinsky and Campbell were married from 1972 to 1983.

Divinsky received a Bachelor of Science from the University of Manitoba in 1946. He received a Master of Science in 1947, and a PhD in Mathematics under A. A. Albert in 1950 from the University of Chicago after which he returned to Winnipeg and was on the staff of the Mathematics Department of the University of Manitoba for most of the '50s. Divinsky then moved to Vancouver where he served as a mathematics professor, and also as an assistant dean of science, at the University of British Columbia in Vancouver, where he spent the remainde] of his professional career.

He was featured in many segments relating to mathematics and chess on the Discovery Channel Canada program @discovery.ca, now called Daily Planet. During the first two seasons of the show, he presented a weekly contest segment emphasizing math puzzles.

Divinsky served on the Vancouver School Board, from 1974 to 1980, and was the Chair from 1978 to 1980. He served as an alderman on Vancouver's city council from 1981 to 1982.

Divinsky learned his early chess as a teenager at the Winnipeg Jewish Chess Club, along with Yanofsky. He tied for 3rd–4th places in the Closed Canadian Chess Championship, held at Saskatoon 1945, with 9.5/12, along with John Belson; the joint winners were Yanofsky and Frank Yerhoff at 10.5/12. In the 1951 Closed Canadian Chess Championship, held at Vancouver, Divinsky scored 6/12 to tie for 5th–7th places. He won the Manitoba Championship in both 1946 and 1952, and finished runner-up in 1945. He tied for first place in the 1959 Manitoba Open. Divinsky scored 7.5/11 at Bognor Regis 1966, finishing in a tie for 7–13th places.

He represented Canada twice at the Chess Olympiads, in 1954 at Amsterdam (second reserve board, 0.5/1), and in 1966 at Havana (second reserve board, 4.5/8). Divinsky served as playing captain for both teams, and was the non-playing captain for the 1988 Canadian Olympiad team. Divinsky attained the playing level of National Master in Canada, and received through the Commonwealth Chess Association (founded by English Grandmaster Raymond Keene) the honorary title of International Master (although he did not receive this title officially from FIDE, the World Chess Federation).

Divinsky was also a Life Master at Bridge from 1972.




1925 Klaus Friedrich Roth (29 October 1925 – 10 November 2015) German-born British mathematician who was awarded the Fields Medal in 1958. His major work has been in number theory, particularly the analytic theory of numbers. He solved in the famous Thue-Siegel problem (1955) concerning the approximation to algebraic numbers by rational numbers (for which he won the medal). Roth also proved in 1952 that a sequence with no three numbers in arithmetic progression has zero density (a conjecture of Erdös and Turán of 1935).*TIS






DEATHS


1783 Jean le Rond D'Alembert (16 Nov 1717, 29 Oct 1783) was abandoned by his parents on the steps of Saint Jean le Rond, which was the baptistery of Notre-Dame, qv in Section 7-A-1. Foster parents were found and he was christened with the name of the saint. [Eves, vol. II, pp. 32 33. Okey, p. 297.] When he became famous, his mother attempted to reclaim him, but he rejected her. *VFR Known for his work in various fields of applied mathematics, in particular dynamics. In 1743 he published his Traité de dynamique (Treatise on Dynamics). The d'Alembert principle extends Newton's third law of motion, that Newton's law holds not only for fixed bodies but also for free moving bodies. D'Alembert also wrote on fluid dynamics, the theory of winds, the properties of vibrating strings and conducted experiments on the properties of sound . His most significant purely mathematical innovation was his invention and development of the theory of partial differential equations. He published eight volumes of mathematical studies (1761-80). He was editor of the mathematical and scientific articles for Denis Diderot's Encyclopédie.*TIS




1917 Giovanni Battista Guccia (21 Oct 1855 in Palermo, Italy - 29 Oct 1914 in Palermo, Italy) Guccia's work was on geometry, in particular Cremona transformations, classification of curves and projective properties of curves. His results published in volume one of the Rendiconti del Circolo Matematico di Palermo were extended by Corrado Segre in 1888 and Castelnuovo in 1897. *SAU




1921 Konstantin Alekseevich Andreev (26 March 1848 in Moscow, Russia - 29 Oct 1921 Near Sevastopol, Crimea) Andreev is best known for his work on geometry, although he also made contributions to analysis. In the area of geometry he did major pieces of work on projective geometry. Let us note one particular piece of work for which he has not received the credit he deserves. Gram determinants were introduced by J P Gram in 1879 but Andreev invented them independently in the context of problems of expansion of functions into orthogonal series and the best quadratic approximation to functions. *SAU




1931 Gabriel Xavier Paul Koenigs (17 January 1858 Toulouse, France – 29 October 1931 Paris, France) was a French mathematician who worked on analysis and geometry. He was elected as Secretary General of the Executive Committee of the International Mathematical Union after the first world war, and used his position to exclude countries with whom France had been at war from the mathematical congresses.
He was awarded the Poncelet Prize for 1913.*Wik




1933 Paul Painlevé ( 5 December 1863 – 29 October 1933)  worked on differential equations. He served twice as prime-minister of France. *SAU

Some differential equations can be solved using elementary algebraic operations that involve the trigonometric and exponential functions (sometimes called elementary functions). Many interesting special functions arise as solutions of linear second order ordinary differential equations. Around the turn of the century, Painlevé, É. Picard, and B. Gambier showed that of the class of nonlinear second order ordinary differential equations with polynomial coefficients, those that possess a certain desirable technical property, shared by the linear equations (nowadays commonly referred to as the 'Painlevé property') can always be transformed into one of fifty canonical forms. Of these fifty equations, just six require 'new' transcendental functions for their solution. These new transcendental functions, solving the remaining six equations, are called the Painlevé transcendents, and interest in them has revived recently due to their appearance in modern geometry, integrable systems and statistical mechanics *Wik



1951 Robert Aitken (31 Dec 1864, 29 Oct 1951) American astronomer who specialized in the study of double stars, of which he discovered more than 3,000. He worked at the Lick Observatory from 1895 to 1935, becoming director from 1930. Aitken made systematic surveys of binary stars, measuring their positions visually. His massive New General Catalogue of Double Stars within 120 degrees of the North Pole allowed orbit determinations which increased astronomers' knowledge of stellar masses. He also measured positions of comets and planetary satellites and computed orbits. He wrote an important book on binary stars, and he lectured and wrote widely for the public. *TI



1959 Edith Clarke (February 10, 1883 – October 29, 1959) was an American electrical engineer. She was the first woman to be professionally employed as an electrical engineer in the United States, and the first female professor of electrical engineering in the country. She was the first woman to deliver a paper at the American Institute of Electrical Engineers; the first female engineer whose professional standing was recognized by Tau Beta Pi, the oldest engineering honor society and the second oldest collegiate honor society in the United States; and the first woman named as a Fellow of the American Institute of Electrical Engineers. She specialized in electrical power system analysis and wrote Circuit Analysis of A-C Power Systems.

After being orphaned at age 12, she was raised by an older sister. She used her inheritance to study mathematics and astronomy at Vassar College, where she graduated in 1908.


Unable to find work as an engineer, Clarke went to work for General Electric as a supervisor of computers in the Turbine Engineering Department. During this time, she invented the Clarke calculator, an early graphing calculator, a simple graphical device that solved equations involving electric current, voltage and impedance in power transmission lines. The device could solve line equations involving hyperbolic functions ten times faster than previous methods. She filed a patent for the calculator in 1921 and it was granted in 1925.

She was offered a job by GE as a salaried electrical engineer in the Central Station Engineering Department – the first professional female electrical engineer in the United States. She retired from General Electric in 1945.

Her background in mathematics helped her achieve fame in her field. On February 8, 1926, as the first woman to deliver a paper at the American Institute of Electrical Engineers' (AIEE) annual meeting, she showed the use of hyperbolic functions for calculating the maximum power that a line could carry without instability. The paper was of importance because transmission lines were getting longer, leading to greater loads and more chances for system instability, and Clarke's paper provided a model that applied to large systems.


In 1943, Clarke wrote an influential textbook in the field of power engineering, Circuit Analysis of A-C Power Systems, based on her notes for lectures to GE engineers. This two-volume textbook teaches about her adaption of the symmetrical components system, in which she became interested while working for the second time at GE.

In 1947, she joined the faculty of the Electrical Engineering Department at the University of Texas at Austin, making her the first female professor of electrical engineering in the country.

Ms. Clarke died in 1959 at the age of seventy-six.

Her calculator was a dynamic nomogram






1993 Lipman Bers (May 22, 1914 – October 29, 1993) was an American mathematician born in Riga who created the theory of pseudoanalytic functions and worked on Riemann surfaces and Kleinian groups. He was also known for his work in human rights activism.

Bers' doctoral work was on the subject of potential theory. While in Paris, he worked on Green's function and on integral representations. After first moving to the US, while working for YIVO, he researched Yiddish mathematics textbooks rather than pure mathematics.

At Brown, he began working on problems of fluid dynamics, and in particular on the two-dimensional subsonic flows associated with cross-sections of airfoils. At this time, he began his work with Abe Gelbart on what would eventually develop into the theory of pseudoanalytic functions. Through the 1940s and 1950s he continued to develop this theory, and to use it to study the planar elliptic partial differential equations associated with subsonic flows. Another of his major results in this time concerned the singularities of the partial differential equations defining minimal surfaces. Bers proved an extension of Riemann's theorem on removable singularities, showing that any isolated singularity of a pencil of minimal surfaces can be removed; he spoke on this result at the 1950 International Congress of Mathematicians and published it in Annals of Mathematics.

Later, beginning with his visit to the Institute for Advanced Study, Bers "began a ten-year odyssey that took him from pseudoanalytic functions and elliptic equations to quasiconformal mappings, Teichmüller theory, and Kleinian groups". With Lars Ahlfors, he solved the "moduli problem", of finding a holomorphic parameterization of the Teichmüller space, each point of which represents a compact Riemann surface of a given genus. During this period he also coined the popular phrasing of a question on eigenvalues of planar domains, "Can one hear the shape of a drum?", used as an article title by Mark Kac in 1966 and finally answered negatively in 1992 by an academic descendant of Bers. In the late 1950s, by way of adding a coda to his earlier work, Bers wrote several major retrospectives of flows, pseudoanalytic functions, fixed point methods, Riemann surface theory prior to his work on moduli, and the theory of several complex variables. In 1958, he presented his work on Riemann surfaces in a second talk at the International Congress of Mathematicians 

In 1961, Bers was elected a Fellow of the American Academy of Arts and Sciences, and in 1965 he became a Fellow of the American Association for the Advancement of Science. He joined the National Academy of Sciences in 1964. He was a member of the Finnish Academy of Sciences, and the American Philosophical Society. He received the AMS Leroy P. Steele Prize for mathematical exposition in 1975 for his paper "Uniformization, moduli, and Kleinian groups". In 1986, the New York Academy of Sciences gave him their Human Rights Award. In the early 1980s, the Association for Women in Mathematics held a symposium to honor Bers' accomplishments in mentoring women mathematicians.*Wik

Photo by Paul Halmos *SAU



1993 Robert Palmer Dilworth (December 2, 1914 – October 29, 1993) was an American mathematician. His primary research area was lattice theory; his biography at the MacTutor History of Mathematics archive states "it would not be an exaggeration to say that he was one of the main factors in the subject moving from being merely a tool of other disciplines to an important subject in its own right". He is best known for Dilworth's theorem (Dilworth 1950) relating chains and antichains in partial orders; he was also the first to study antimatroids (Dilworth 1940). Dilworth advised 17 Ph.D. students and as of 2010 has 373 academic descendants listed at the Mathematics Genealogy Project, many through his student Juris Hartmanis, a noted complexity theorist.*Wik



2013 Douglas Samuel Jones (10 January 1922 – 29 November 2013) was a mathematician and electrical engineer known for his works in the field of electromagnetism.

In 1940, Jones began studying electrical engineering at Clarendon Laboratory of the Corpus Christi College, Oxford University.

Jones joined the RAF in 1942 and graduated MA in applied mathematics from Oxford in 1947. He then went to Massachusetts Institute of Technology to study electrical engineering, but switched to physics, studying under Victor Weisskopf, Herman Feshbach, and Robley Evans. In the same years he led a research team looking at equipment for night fighter operations. Awarded MBE in 1945 for his work with the RAF.

Jones then worked as a lecturer at Manchester University. In 1957 he was appointed chair of Mathematics at the University of Keele.

During his time at Keele, Jones wrote the book The Theory of Electromagnetism in 1964 which established him as a leader in this field.

In 1965, Jones was appointed to the Ivory Chair of Applied Mathematics at Queen's College, Dundee, then part of the University of St Andrews, but which became the University of Dundee in 1967.

Jones retired from the University of Dundee in 1992, gaining the title Emeritus Professor.

He was described by The Scotsman as "one of the most outstanding British mathematicians of his generation". *Wik

Jones received many honours for his outstanding contributions. He was elected a fellow of the Royal Society of Edinburgh (1967), a fellow of the Royal Society of London (1968), awarded the Keith Prize by the Royal Society of Edinburgh (1971-73), given an Honorary DSc from the University of Strathclyde (1975), awarded the Marconi Prize by the Institute of Electrical Engineers (1975), made an Honorary Fellow of Corpus Christi College Oxford (1980), awarded the Balthasar van der Pol Gold Medal by the International Union of Radio Science (1981), awarded the Naylor Prize and Lectureship of the London Mathematical Society (1986), elected a fellow of the Institution of Electrical Engineers (1989), made a life member of the Institute of Electrical and Electronics Engineers (2013).*SAU  





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


Wednesday, 2 September 2026

A Bird in the Hand is worth... a Pigeon Hole Principle

 


Sometimes problems that seem very hard, can be very easy if they are viewed in the right way, and one of those easy ways to make some hard problems manageable is the Pigeon-Hole Principle. Over the last few weeks seems like lots of problems involving this idea have shown up, so I thought I would bring it to you.
The basic idea is so easy any sixth grader would agree; if you have two boxes, and you are going to put three balls in the boxes, then at least one box will get more than one ball..... "well, Duh!" they answer... and yet... it seems easier to apply than it might be. Now that you know the secret, try these two problems. I'll post the answer down lower on the page where you must not look until you take a few minutes to ponder the problems.
Here is the first from a recent blog I read: "39 people are attending a large, formal dinner, which must of course occur at a single, circular table. The guests, after milling about for a while, sit down to eat. It is then pointed out to them that there are name cards labeling assigned seats, and not a single one has sat in the seat assigned to them. Prove that there is some way to rotate the table so that at least two people are in the correct seats."
This one seems tougher, but really isn't, it just requires a different way of thinking. "Suppose you pick six unique integers from 1 to 1000. Prove that at least two of them must have a difference that is a multiple of five.
Before I give you the answers, I will throw in a little cultural information that may amuse and entertain you. The same axiom is often named in honor of Dirichlet who used it in solving Pell's equation. In a discussion on a history group a few years ago Julio Cabillon added that there are a variety of names in different countries for the idea. His list included "le principe des tiroirs de Dirichlet", French for the principle of the drawers of Dirichlet, and the Portuguese "principio da casa dos pombos" for the house of pigeons principle and "das gavetas de Dirichlet" for the drawers of Dirichlet. It also is sometimes simply called Dirichlet's principle and most simply of all, the box principle. Jozef Przytycki wrote me to add, "In Polish we use also:"the principle of the drawers of Dirichlet" that is 'Zasada szufladkowa Dirichleta' ". You just can't have TOO many names for a really useful idea.
Ok, The Proofs... for number one... Suppose you handed each person a number that was how many seats they needed to move to the right to find their assigned seat. Since no one is at the right seat, the number can not be zero or thirty-nine. SO each of the people has a number between 1 and 38...wait, there are 39 people...two of them (at least) must be the same distance away from their assigned seats.... admit it…..that’s pretty cool. (I have a slight question about whether this actually proves the solution of "rotating the table" to put two in their correct seats.  Suppose we know that persons A and B are in each others seats and 5 seats apart.  Rotating the table five seats in either direction would only put one of them in their correct seat.  Maybe all we proved is that there are , at least, two people who are the same distance from their seat.  If we had specified how far away in a clockwise direction they are from their correct seat, we would have a solution to the rotation of the table problem.)
For number two it is sort of the same idea, but you have to think about how much each number would have for a remainder if you divided them by five. The only possible choices are 0, 1, 2, 3, or 4... , five different remainders, but there are six numbers, so two of them have the same remainder...and two numbers that have the same remainder on division by five, are a multiple of five apart.... think of 1,6, 11, etc for remainders of one. If you want to read more about how remainders can play a part in solving problems, see my blog on "casting out sevens" (And other primes) 

And for some history about this beautiful problem solving idea, see this.

On This Day in Math - September 2

   



The importance of the "New Mathematics" lies mainly in the fact that it has taught us the difference between the disc and the circle.

D MacHale, Comic Sections (Dublin 1993)
(I realize that a whole generation has grown up who have no idea what "New Mathematics" means, my apologies to them for a dated quote)


The 245th day of the year; 245 is the fifth StellaOctangula number. The sum of the 5th octahedral number (85) and eight of the fourth tetrahedral numbers (20). 245 =85 + 8 (20)

245 is also the sum of three consecutive squares, 245=82+92+102

There are 245 odd entries in the first 33 rows of the Arithmetic Triangle.

245 is also the 46th prime , 199+46=245 (is there a mathematical significance for these numbers, or just a nice curiosity?  Serious question.)


See Math Facts for every Year Day here.



EVENTS


1666 Five days previously Wren had visited Old St. Paul's Cathedral to determine the reconstruction needs for the decaying old building.    During the night of Sep 2, and for the next five days, the Great Fire of London will burn out about 7/8 of the city of London and greatly alter Wren's work at St Paul's.  [The Great Fire of is supposed to have started in the house of King Charles II's baker on Pudding Lane near London Bridge.*@History Magazine]

 Image from Wikipedia,


In 1752, today was the last day of the Julian calendar in Great Britain and the British colonies; the Gregorian Calendar designed to correct the extra leap year day problem went into effect the next day with tomorrow being September 14, hence 11 days were dropped. Most other countries made the adjustment in 1582. *TIS

Some historians suggested there had been riots, the oft called the Calendar Riots of 1752.  These claims of civil unrest and rioters demanding “Give us our eleven days” may have arisen through a misinterpretation of a contemporary painting by William Hogarth. His 1755 painting entitled: “An Election Entertainment” refers to the elections of 1754 and depicts a tavern dinner organised by Whig candidates. A stolen Tory campaign banner with the slogan, “Give us our Eleven Days” can be seen lower right (on the black  banner on the floor under the seated gentleman’s foot). The Tories can be seen outside the window, demonstrating.Claims of civil unrest and rioters demanding “Give us our eleven days” may have arisen through a misinterpretation of a contemporary painting by William Hogarth. His 1755 painting entitled: “An Election Entertainment” refers to the elections of 1754 and depicts a tavern dinner organised by Whig candidates. A stolen Tory campaign banner with the slogan, “Give us our Eleven Days” can be seen lower right (on the black banner on the floor under the seated gentleman’s foot). The Tories can be seen outside the window, demonstrating.




1808 Gauss writes Wolfgang Bolyai: “It is not knowledge, but the act of learning, not possession but the act of getting there, which grants the greatest enjoyment.” * Mathematical Circles Squared,Howard Eves, pg 113



1885 Gunshots rang out on the afternoon of September 2, 1885, in Rock Springs, Wyoming Territory. Home to hundreds of Chinese coal miners who had come to the United States for work, the settlement’s Chinatown was facing impending bloodshed. After a morning of violence against Chinese workers in one of the nearby mines, more than a hundred white men armed with guns and other weapons had surrounded the neighborhood.

Tensions between Chinese and white coal miners in Rock Springs had been growing for a long time. White miners, organized under the Knights of Labor union, sought to improve workers’ conditions through unionizing and striking against the giant Union Pacific Railroad Company. Fed up with the company’s proposals to cut pay and its requirement that miners buy necessities at its overpriced stores, the Knights of Labor demanded negotiations with the miners’ employers. The union represented the will of oppressed workers, but it also represented a racist sentiment: the Knights of Labor argued that a large part of the miners’ problems was being caused by an influx of Chinese immigrants who were willing to work for less pay than white workers. When the Chinese workers at Rock Springs refused to strike with the white miners, tensions between the groups reached a breaking point. After returning from the mines to their homes to retrieve their weapons, white men, as well as women, stormed Chinatown that September afternoon. Their violent crusade, now known as the Rock Springs Massacre, resulted in the deaths of 28 Chinese people and the injury of 15, making it one of the bloodiest racially motivated massacres against Chinese immigrants in America.

What happened at Rock Springs was symptomatic of much wider racist sentiment in the United States at the time. Anti-Chinese views had existed since the first major waves of Chinese workers had arrived in North America to build the transcontinental railroad. Such workers represented a relatively cheap source of labour willing to work in dangerous conditions, and they soon replaced many of their white counterparts. In fact, the racist expression “not a Chinaman’s chance” is believed to derive from the dangerous working conditions Chinese workers typically found themselves in, such as being lowered along cliff faces to detonate explosives.*Britannica




1905 While a student at Kumbakonam, Ramanujan was so obsessed with his math studies that he failed all his other classes. It seems after a conflict at home, he ran away, causing his mother to send a missing-person letter to the newspaper:


1958 The National Defense Education act was passed in response to Sputnik (4 October 1957). $840 million was appropriated to improve the teaching of mathematics, science, and foreign languages. *VFR

The year 1957 also coincided with an acute shortage of mathematicians in the United States. The electronic computer created a demand for mathematicians as programmers and it also shortened the lead time between the development of a new mathematical theory and its practical application, thereby making their work more valuable. The United States could no longer rely on European refugees for all of its mathematicians, though they remained an important source, so it had to drastically increase the domestic supply. At the time, "mathematics" was interpreted as pure mathematics rather than applied mathematics. The problem in the 1950s and 1960s was that industry, including defense, was absorbing the mathematicians who were also needed at high schools and universities training the next generation. At the university level, even more recently, there have been years when it was difficult to hire applied mathematicians and computer scientists because of the rate that industry was absorbing them.

This chart shows the number of PhDs in the US by year from 1900.  The linearity across the 20th Century of the semi-log graph may make one wonder if the program really had much impact.  In fact the slope of growth rate drops significantly around the 70's (Which could be from age distribution in the country or numerous other causes.)





1997 After its Deep Blue chess-playing computer defeated human world chess champion Gary Kasparov​ in a closely watched match in May, the pioneering computer company decided to make the machine even faster and stronger. On September 2, IBM announced that its RS/6000 SP model, a parallel supercomputer, was now 58 percent faster thanks to a new microprocessor and some software refinements. Kasparov was not available for comment.*CHM

a Deep Blue Processor, *Wik




2023  Dennis Austin, the principal software developer of PowerPoint, passed away from lung cancer on Sept. 1. He was 76. The Washington Post reports:

Released in 1987 by Forethought, a small software firm, PowerPoint was the digital successor to overhead projectors, transforming the labor-intensive process of creating slides -- a task typically assigned to design departments or outsourced -- to one where any employee with a computer could point, click and rearrange information with a mouse. "Our users were familiar with computers, but probably not graphics software," Mr. Austin wrote in an unpublished history of the software's development. "They were highly motivated to look their best in front of others, but they weren't savvy in graphics design."

Working alongside Robert Gaskins, the Forethought executive who conceived the software, it was Mr. Austin's job as the software engineer to make PowerPoint (originally called Presenter) easy to operate. He accomplished this with a "direct-manipulation interface," he wrote, meaning that "what you are editing looks exactly like the final product." Originally targeted for Macintosh computers, which had a graphical interface, Presenter included ways for users to incorporate graphics, clip art and multiple fonts. In addition, the slides could be uniform with graphic borders, corporate logos and slide numbers. The goal, Mr. Austin wrote, was "to create presentations -- not simply slides."

In his book "Sweating Bullets: Notes about Inventing PowerPoint" (2012), Gaskins wrote that "Dennis came up with at least half of the major design ideas," and was "completely responsible for the fluid performance and the polished finish of the implementation." "It's a good bet," Gaskins added, "that if Dennis had not been the person designing PowerPoint, no one would ever have heard of it."



BIRTHS


1841 Paul Matthieu Hermann Laurent born (2 September 1841 Luxembourg City – 19 February 1908 Paris, France). He developed statistical formulas for the calculation of actuarial tables and studied heat conduction. *VFR

In 1883 he became an examiner at the École Polytechnique. Because examiners were forbidden from publishing textbooks on the very subjects they examined, Laurent found a workaround—he published under pseudonyms! In 1895 he released Traité d’arithmétique, attributing it to his friends C. A. Laisant and Émile Lemoine to comply with the rules while still sharing his knowledge
Despite his large body of works, Laurent series expansions for complex functions were not named after him, but after Pierre Alphonse Laurent.





1850 Alfred Pringsheim born (2 September 1850 – 25 June 1941), a German mathematician who worked on real and complex functions. *SAU Pringsheim's theorem concerns the convergence of a power series with non-negative real coefficients. Pringsheim and Ivan Śleszyński, working separately, proved what is now called the Śleszyński–Pringsheim theorem on convergence of certain continued fractions.*Wik




1856 Wilhelm Franz Meyer born (2 September 1856 in Magdeburg; 11 April 1934 in Königsberg . Meyer studied algebraic geometry, algebraic curves and invariant theory.*SAU He was a Founding member of the German Mathematical Society. *Wik

 



1877 Frederick Soddy (2 September 1877 – 22 September 1956) was an English radiochemist and monetary economist who explained, with Ernest Rutherford, that radioactivity is due to the transmutation of elements, now known to involve nuclear reactions. He also proved the existence of isotopes of certain radioactive elements. He received the Nobel Prize for Chemistry in 1921, and named after him is small crater on the far side of the Moon and the radioactive Uranium mineral, Soddyite. He rediscovered the Descartes' theorem in 1936 and published it as a poem. The kissing circles in this problem are sometimes known as Soddy circles.
The Poem begins,

For pairs of lips to kiss maybe
Involves no trigonometry.
'Tis not so when four circles kiss
Each one the other three.

The entire poem is found here, along with a story about how, In a strange "chain reaction" of ideas, Soddy played a part in the US developing an atomic bomb. *(Assorted notes)



1878 (René-)Maurice Fréchet (2 Sep 1878; 4 June 1973) was a French mathematician known chiefly for his contribution to real analysis. He is credited with being the founder of the theory of abstract spaces, which generalized the traditional mathematical definition of space as a locus for the comparison of figures; in Fréchet's terms, space is defined as a set of points and the set of relations. In his dissertation of 1906, he investigated functionals on a metric space and formulated the abstract notion of compactness. In 1907, he discovered an integral representation theorem for functionals on the space of quadratic Lebesgue integrable functions. He also made important contributions to statistics, probability and calculus. *TIS




1891 Ivan Matveyevich Vinogradov (2 Sep 1891[OS? SAU gives 14 Sep], 20 Mar 1983)Soviet mathematician known for his contributions to the analytical theory of numbers, including a partial solution of the Goldbach conjecture proving that every sufficiently large odd integer can be expressed as the sum of three odd primes. He described his methods in his most celebrated piece of work Some Theorems Concerning the Theory of Prime Numbers (1937)*TIS




1892 Frank Wilcoxon, (2 September 1892 - 18 November 1965) whose name should be familiar to anyone who has used classic nonparametric (distribution-free) tests, was born in County Cork, Ireland, to American parents. He spent much of his early life in the Hudson River Valley region of New York.  Sometime around 1908 he ran away to sea, jumped ship after a week of chipping paint when the ship failed to sail, and hid out for years from the imagined consequences of this desertion in the back country of West Virginia, first as an oil well worker, then as a tree surgeon. A trip to Boston to hone the latter skills at a forestry school fizzled when it turned out that the school had closed. Finally returning home, he was sent to the Pennsylvania Military College in 1917, another totally incompatible environment. His twin sister died in childbirth in 1918.

After a WW1 job with the Atlas Powder Company in Michigan, Wilcoxon entered Rutgers in 1920, and completed an MS in chemistry in 1921; he then shifted to Cornell and physical chemistry, and got his PhD in 1924. 

Much of his early work was in research related to chemistry, with his interest in statistics resulting from reading Fisher's well-known book Statistical Methods for Research Workers (which I recall reading somewhere was for some time the most cited book in all of science). During the 1940s Dr. Wilcoxon was perhaps most instrumental in the growth of the fledgling field of nonparametric or distribution-free statistics, introducing his signed-rank test for paired samples and his famous two-sample rank-sum test as an alternative to Student's unpaired two-sample t-test, each of which carry Wilcoxon's name in its appellation. (Wilcoxon's 1945 paper introducing these two tests was titled "Individual Comparisons by Ranking Methods".)

At the time of his death, Wilcoxon was working on a multivariate generalization of his two-sample rank sum test. His proposals were described posthumously (by Bradley, 1967). They have not been taken up by the statistical community.

For a good description of how outliers led the chemist Wilcoxon to develop these tests, read Chapter 16, "Doing Away With Parameters", in David Salsburg's book The Lady Tasting Tea, in which Salsburg writes in a footnote that "the nonparametric approach was not fully understood to be such a drastic revolution until Wilcoxon's work in this field" *David Bee




1909 Deane Montgomery (2 Sept 1909 - 15 March 1992 in Chapel Hill, North Carolina, USA) was a mathematician specializing in topology who was one of the contributors to the final resolution of Hilbert's fifth problem in the 1950s. He served as President of the American Mathematical Society from 1961 to 1962.
Born in the small town of Weaver, Minnesota, he received his B.S. from Hamline University in St. Paul, MN and his Masters and Ph.D. from the University of Iowa in 1933; his dissertation advisor was Edward Chittenden.
In 1941 Montgomery was awarded a Guggenheim Fellowship. In 1988, he was awarded the American Mathematical Society Leroy P. Steele Prize for Lifetime Achievement.*Wik




1913 Israel Moiseevich Gelfand, (2 September [O.S. 20 August] 1913 – 5 October 2009) was a prominent Soviet-American mathematician. He made significant contributions to many branches of mathematics, including group theory, representation theory and functional analysis. The recipient of many awards, including the Order of Lenin and the first Wolf Prize, he was a Foreign Fellow of the Royal Society and professor at Moscow State University and, after immigrating to the United States shortly before his 76th birthday, at Rutgers University. Gelfand is also a 1994 MacArthur Fellow.

His legacy continues through his students, who include Endre Szemerédi, Alexandre Kirillov, Edward Frenkel, Joseph Bernstein, David Kazhdan, as well as his own son, Sergei Gelfand.

Gelfand is known for many developments including:

the book Calculus of Variations (1963), which he co-authored with Sergei Fomin;

Gelfand's formula, which expresses the spectral radius as a limit of matrix norms.

the Gelfand representation in Banach algebra theory;

the Gelfand–Mazur theorem in Banach algebra theory;

the Gelfand–Naimark theorem;

the Gelfand–Naimark–Segal construction;

Gelfand–Shilov spaces;

the Gelfand–Pettis integral;

the representation theory of the complex classical Lie groups;

contributions to the theory of Verma modules in the representation theory of semisimple Lie algebras (with I. N. Bernstein and S. I. Gelfand);

contributions to distribution theory and measures on infinite-dimensional spaces

the first observation of the connection of automorphic forms with representations (with Sergei Fomin);

conjectures about the Atiyah–Singer index theorem;

ordinary differential equations (Gelfand–Levitan theory);

work on calculus of variations and soliton theory (Gelfand–Dikii equations);

contributions to the philosophy of cusp forms;

Gelfand–Fuchs cohomology of Lie algebras;

Gelfand–Kirillov dimension;

integral geometry;

combinatorial definition of the Pontryagin class;

Coxeter functors;

general hypergeometric functions;

Gelfand–Tsetlin patterns;

Gelfand–Lokutsievski method;

and many other results, particularly in the representation theory of classical groups.




1923 René Thom (September 2, 1923 – October 25, 2002) is known for his development of catastrophe theory, a mathematical treatment of continuous action producing a discontinuous result. *SAU
Born in Montbeliard, France. In 1958 he received a Fields Medal for his 1954 creation of cobordism in algebraic topology. His classification of manifolds used homotopy theory in a fundamental way and this work became an important example of general cohomology theory. *VFR Thom is also known for his later work developing the catastrophe theory (1972), a mathematical treatment of continuous action producing a discontinuous result. Thom's theory is an attempt to describe, in a way that is impossible using differential calculus, those situations in which gradually changing forces lead to so-called catastrophes, or abrupt changes. The theory has widespread application in the physical and biological sciences and in the social sciences, but eventually fell from favour.*TIS




1925 Roy Jay Glauber (September 1, 1925 – December 26, 2018)  was an American theoretical physicist. He was the Mallinckrodt Professor of Physics at Harvard University and Adjunct Professor of Optical Sciences at the University of Arizona. Born in New York City, he was awarded one half of the 2005 Nobel Prize in Physics "for his contribution to the quantum theory of optical coherence", with the other half shared by John L. Hall and Theodor W. Hänsch.
In this work, published in 1963, he created a model for photodetection and explained the fundamental characteristics of different types of light, such as laser light (see coherent state) and light from light bulbs (see blackbody). His theories are widely used in the field of quantum optics. *Wik




1948 Christa McAuliffe (2 Sep 1948; died 28 Jan 1986) Astronaut, first teacher in space, who died on

the Challenger Space Shuttle when 73 seconds into its 10th launch, Challenger (STS-51L) exploded in midair, killing its crew of seven. Space shuttle flights were suspended until 1988. An independent U.S. commission blamed the disaster on unusually cold temperatures that morning and the failure of the O-rings, a set of gaskets in the rocket boosters. *TIS





DEATHS


1764 Nathaniel Bliss (28 November 1700 – 2 September 1764) was an English mathematician and astronomer who went on to become Astronomer Royal. He succeeded Edmond Halley as professor of geometry at Oxford University in 1742 and was elected a Fellow of the Royal Society the same year. He succeeded James Bradley to become the fourth Astronomer Royal in 1762, but held the post for too short a period to make a significant impact (1762-1764).*Wik




1768 Antoine Deparcieux (October 28, 1703 – September 2, 1768) was a French mathematician who is best known for an early work on annuities and mortality.*SAU In 1746, he published Essai sur les probabilités de la durée de la vie humaine (An Essay on the Probabilities of the Duration of Human Life). Deparcieux analyzed in detail empirical observations. As a mathematician and physicist, he can be considered, after Halley and Struyck, one of the founders of the estimation of longevity and all the issues surrounding that concept. *Wik





1832 Franz Xaver von Zach (4 June 1754, 2 Sep 1832) German-Hungarian astronomer patronized by Duke Ernst of Saxe-Gotha-Altenburg. Director of observatory near Gotha (1787-1806). There he organized in 1798 the first congress of astronomers with Josef Lalande (1732-1807) as celebrated guest. In last years of the 18th century he formed a group of 24 astronomers chosen from throughout Europe to track down a "missing" planet between the orbits of Mars and Jupiter, where they instead discovered the asteroids. His greatest contribution was in the organizational area, for he maintained an enormous correspondence with all the astronomers of his time, and edited 28 volumes of Monatliche Korrespondenz zur Beforderung der Erd- und Himmelskunde (1800-13).*TIS





1834 Thomas Telford (9 August 1757 Glendinning, Westerkirk, Eskdale, Dumfriesshire, Scotland - 2 September 1834 (aged 77) 24 Abingdon Street, Westminster, London) He is the founder of modern bridge construction, his crowning achievement being the Menai suspension bridge in Wales. Do you know the shape of the cables on a suspension bridge? *VFR


Menai Suspension Bridge *Wik


Telford's reputation in Shropshire led to his appointment in 1793 to manage the detailed design and construction of the Ellesmere Canal, linking the ironworks and collieries of Wrexham via the north-west Shropshire town of Ellesmere, with Chester, utilising the existing Chester Canal, and then the River Mersey.

Among other structures, this involved the spectacular Pontcysyllte Aqueduct over the River Dee in the Vale of Llangollen, where Telford used a new method of construction consisting of troughs made from cast iron plates and fixed in masonry. Extending for over 1,000 feet (300 metres) with an altitude of 126 ft (38 m) above the valley floor, the Pontcysyllte Aqueduct consists of nineteen arches, each with a 45 ft (14 m) span. Being a pioneer in the use of cast-iron for large scaled structures, Telford had to invent new techniques, such as using boiling sugar and lead as a sealant on the iron connections. Eminent canal engineer William Jessop oversaw the project, but he left the detailed execution of the project in Telford's hands. The aqueduct was designated a UNESCO World Heritage Site in 2009. *Wik

A canal boat traverses the Pontcysyllte aqueduct in North Wales



1836 William Henry FRS (12 December 1774 – 2 September 1836) was an English chemist. He was the son of Thomas Henry and was born in Manchester England. He developed what is known today as Henry's Law.

William Henry was apprenticed to Thomas Percival and later worked with John Ferriar & John Huit at the Manchesters Infirmary.  He began to study medicine at University of Edinburgh in 1795, taking his medical in 1807, but ill-health interrupted his practice as a physician, and he devoted his time mainly to chemical research, especially with regard to gases. One of his best-known papers (published in Philosophical Transactions of the Royal Society, 1803) describes experiments on the quantity of gases absorbed by water at different temperatures and under different pressures. His results are known today as Henry's law. His other papers deal with gas-analysis, fire-damp, illuminating gas, the composition of hydrochloric acid and of ammonia, urinary and other morbid concretions, and the disinfecting powers of heat. His Elements of Experimental Chemistry (1799) enjoyed considerable vogue in its day, going through eleven editions in 30 years. He was one of the founders of the Mechanics' Institute, the original precursor of University of Manchester Institute of Science and Technology.

He was elected a Fellow of the Royal Society in February 1809, having been awarded their prestigious Copley Medal in 1808.

He shot himself in his private chapel at Pendlebury, near Manchester, in 1836.




1865 Sir William Rowan Hamilton (4 Aug 1805, 2 Sep 1865) Irish mathematician in the fields of optics, geometrics, and classical mechanics. By age 12, Hamilton had already learned fourteen languages when he met the American, Zerah Colburn, who could perform amazing mental arithmetical feats, and they joined in competitions. It appears that losing to Colburn sparked Hamilton's interest in mathematics. At 15, he began studied the works of LaPlace and Newton so by age 17 had become the greatest living mathematician. He contributed to the development of optics, dynamics, and algebra. His invention of the calculus of quaternions enabled a three-dimensional algebra or geometry which provided a basis for the later development of quantum mechanics. *TIS





2002 Sheila Edmonds   (1 April 1916 – 2 September 2002) was one of the last of the old-style Cambridge dons who devoted their lives to teaching and to their colleges.
Sheila had an excellent undergraduate career ending up a `Wrangler', as students who are placed first class in the examinations for the Mathematical Tripos are called - though this did not result in a Cambridge BA degree because women were ineligible until 1947. The following year, she was awarded a distinction in the notoriously demanding Part III of the Tripos. In a speech she gave at her 80th birthday dinner, she acknowledged that a key to her success was the thorough mathematical training she received from her Director of Studies at Newnham, Margaret Grimshaw, who was 11 years her senior and another of the old-style dons. *Newnham College web page





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