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Roger Apéry
Roger Apéry (; 14 November 1916, Rouen – 18 December 1994, Caen) was a French mathematician most remembered for Apéry's theorem, which states that is an irrational number. Here, denotes the Riemann zeta function. Biography Apéry was born in Rouen in 1916 to a French mother and Greek father. His childhood was spent in Lille until 1926, when the family moved to Paris, where he studied at the Lycée Ledru-Rollin and the Lycée Louis-le-Grand. He was admitted at the École normale supérieure in 1935. His studies were interrupted at the start of World War II; he was mobilized in September 1939, taken prisoner of war in June 1940, repatriated with pleurisy in June 1941, and hospitalized until August 1941. He wrote his doctoral thesis in algebraic geometry under the direction of Paul Dubreil and René Garnier in 1947. In 1947 Apéry was appointed Maître de conférences (lecturer) at the University of Rennes. In 1949 he was appointed Professor at the University of Caen, whe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rouen
Rouen (, ; or ) is a city on the River Seine in northern France. It is the prefecture of the Regions of France, region of Normandy (administrative region), Normandy and the Departments of France, department of Seine-Maritime. Formerly one of the largest and most prosperous cities of Middle Ages, medieval Europe, the population of the metropolitan area (french: functional area (France), aire d'attraction) is 702,945 (2018). People from Rouen are known as ''Rouennais''. Rouen was the seat of the Exchequer of Normandy during the Middle Ages. It was one of the capitals of the Anglo-Normans, Anglo-Norman dynasties, which ruled both England and large parts of modern France from the 11th to the 15th centuries. From the 13th century onwards, the city experienced a remarkable economic boom, thanks in particular to the development of textile factories and river trade. Claimed by both the French and the English during the Hundred Years' War, it was on its soil that Joan of Arc was tried ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
May 1968 In France
Beginning in May 1968, a period of civil unrest occurred throughout France, lasting some seven weeks and punctuated by demonstrations, general strikes, as well as the occupation of universities and factories. At the height of events, which have since become known as May 68, the economy of France came to a halt. The protests reached such a point that political leaders feared civil war or revolution; the national government briefly ceased to function after President Charles de Gaulle secretly fled France to West Germany on the 29th. The protests are sometimes linked to similar movements that occurred around the same time worldwide and inspired a generation of protest art in the form of songs, imaginative graffiti, posters, and slogans. The unrest began with a series of far-left student occupation protests against capitalism, consumerism, American imperialism and traditional institutions. Heavy police repression of the protesters led France's trade union confederations to call ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edgar Faure
Edgar Jean Faure (; 18 August 1908 – 30 March 1988) was a French politician, lawyer, essayist, historian and memoirist who served as Prime Minister of France in 1952 and again between 1955 and 1956.Edgar Faure . Encyclopædia Britannica Prior to his election to the for Jura under the Fourth Republic in [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radical Party Of The Left
The Radical Party of the Left (french: Parti radical de gauche, PRG) is a social-liberal political party in France. A party in the Radical tradition, since 1972 the PRG was a close ally of the major party of the centre-left in France, the Socialist Party (french: link=no, Parti socialiste, PS). After the 2017 presidential and legislative elections, negotiations to merge the PRG with the Radical Party (from which the PRG emerged in 1972) began and the refounding congress to reunite the parties into the Radical Movement was held on 9 and 10 December 2017. However, a faction of ex-PRG members, including its last president Sylvia Pinel, split from the Radical Movement in February 2019 due to its expected alliance with La République En Marche in the European elections and resurrected the PRG. History The party was formed in 1972 by a split from the Republican, Radical, and Radical-Socialist Party, once the dominant party of the French Left. It was founded by Radicals who oppose ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calvados (department)
Calvados (, , ) is a department in the Normandy region in northwestern France. It takes its name from a cluster of rocks off the English Channel coast. In 2019, it had a population of 694,905.Populations légales 2019: 14 Calvados INSEE History Calvados is one of the original 83 departments created during the on 4 March 1790, in application of the law of 22 December 1789. It had been part of the former province of |
Wadim Zudilin
Wadim Zudilin (Вадим Валентинович Зудилин) is a Russian mathematician and number theory, number theorist who is active in studying Hypergeometric series, hypergeometric functions and zeta constants. He studied under Yuri Valentinovich Nesterenko, Yuri V. Nesterenko and worked at Moscow State University, the Steklov Institute of Mathematics, the Max Planck Institute for Mathematics and the University of Newcastle, Australia. He now works at the Radboud University Nijmegen, Radboud University Nijmegen, the Netherlands. He has reproved Apéry's theorem that ζ(3) is irrational, and expanded it. Zudilin proved that at least one of the four numbers ζ(5), ζ(7), ζ(9), or ζ(11) is irrational. For that accomplishment he won the Distinguished Award of the G. H. Hardy, Hardy-Srinivasa Ramanujan, Ramanujan Society in 2001. With Doron Zeilberger, Zudilin improved upper bound of irrationality measure for ''π'', which as of November 2022 is the current best estimate. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Keith Martin Ball
Keith Martin Ball FRS FRSE (born 26 December 1960) is a mathematician and professor at the University of Warwick. He was scientific director of the International Centre for Mathematical Sciences (ICMS) from 2010 to 2014. Education Ball was educated at Berkhamsted School and Trinity College, Cambridge where he studied the Cambridge Mathematical Tripos and was awarded a Bachelor of Arts degree in mathematics in 1982 and a PhD in 1987 for research supervised by Béla Bollobás. Research Keith Ball's research is in the fields of functional analysis, high-dimensional and discrete geometry and information theory. He is the author of ''Strange Curves, Counting Rabbits, & Other Mathematical Explorations''. Awards and honours Ball was elected a Fellow of the American Mathematical Society The American Mathematical Society (AMS) is an association of professional mathematicians dedicated to the interests of mathematical research and scholarship, and serves the national and internatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alfred Van Der Poorten
Alfred Jacobus (Alf) van der Poorten (16 May 1942 – 9 October 2010) was a Dutch-Australian number theorist, for many years on the mathematics faculties of the University of New South Wales and Macquarie University.... Biography Van der Poorten was born into a Jewish family in Amsterdam in 1942, after the German occupation began. His parents, David and Marianne van der Poorten, gave him into foster care with the Teerink family in Amersfoort, under the name "Fritsje"; the senior van der Poortens went into hiding, were caught by the Nazis, survived the concentration camps, and were reunited with van der Poorten and his two sisters after the war. The family moved to Sydney in 1951, travelling there aboard the SS Himalaya. Van der Poorten studied at Sydney Boys High School from 1955–59, and earned a high score in the Leaving Certificate Examination there. He spent a year in Israel and then studied mathematics at the University of New South Wales, where he earned a bachelor's de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frits Beukers
Frits Beukers () (born 1953, Ankara) is a Dutch mathematician, who works on number theory and hypergeometric functions. In 1979 Beukers received his PhD at Leiden University under the direction of Robert Tijdeman with thesis ''The generalized Ramanujan–Nagell Equation'', published in ''Acta Arithmetica'', vol. 38, 1980/1981. From 1979 to 1980 he was a visiting scholar at the Institute for Advanced Study. He became a professor in Leiden and in the 2000s at Utrecht University. Beukers works on questions of transcendence and irrationality in number theory, and on other topics. In connection with the famous proof by Roger Apéry (1978) on the irrationality of the values of the Riemann zeta function evaluated at the points 2 and 3, Beukers gave a much simpler alternate proof using Legendre polynomials. He also published on questions in mechanics about dynamical system In mathematics, a dynamical system is a system in which a Function (mathematics), function describes the tim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Positive Integer
In mathematics, the natural numbers are those numbers used for counting (as in "there are ''six'' coins on the table") and ordering (as in "this is the ''third'' largest city in the country"). Numbers used for counting are called ''cardinal numbers'', and numbers used for ordering are called ''ordinal numbers''. Natural numbers are sometimes used as labels, known as ''nominal numbers'', having none of the properties of numbers in a mathematical sense (e.g. sports jersey numbers). Some definitions, including the standard ISO 80000-2, begin the natural numbers with , corresponding to the non-negative integers , whereas others start with , corresponding to the positive integers Texts that exclude zero from the natural numbers sometimes refer to the natural numbers together with zero as the whole numbers, while in other writings, that term is used instead for the integers (including negative integers). The natural numbers form a set. Many other number sets are built by success ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apéry's Constant
In mathematics, Apéry's constant is the sum of the reciprocals of the positive cubes. That is, it is defined as the number : \begin \zeta(3) &= \sum_^\infty \frac \\ &= \lim_ \left(\frac + \frac + \cdots + \frac\right), \end where is the Riemann zeta function. It has an approximate value of : . The constant is named after Roger Apéry. It arises naturally in a number of physical problems, including in the second- and third-order terms of the electron's gyromagnetic ratio using quantum electrodynamics. It also arises in the analysis of random minimum spanning trees and in conjunction with the gamma function when solving certain integrals involving exponential functions in a quotient, which appear occasionally in physics, for instance, when evaluating the two-dimensional case of the Debye model and the Stefan–Boltzmann law. Irrational number was named ''Apéry's constant'' after the French mathematician Roger Apéry, who proved in 1978 that it is an ir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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