| dbo:abstract |
John William Scott Cassels, auch Ian Cassels, (* 11. Juni 1922 in Durham; † 27. Juli 2015) war ein britischer Mathematiker, der sich mit Zahlentheorie und arithmetisch-algebraischer Geometrie beschäftigte. Cassels, dessen Vater die Landwirtschaft im County Durham beaufsichtigte, ging in Durham und Edinburgh zur Schule und studierte an der Universität Edinburgh (Master-Abschluss 1943) und an der University of Cambridge (Trinity College), wo er 1949 bei Louis Mordell promoviert wurde. Dazwischen arbeitete er während des Zweiten Weltkrieges wie viele andere Mathematiker am Enigma-Entzifferungsprojekt in Bletchley Park. Im Jahr 1949 wurde er zum Fellow des Trinity College ernannt. Cassels war dann Lecturer in Manchester und ab 1950 in Cambridge, wo er 1963 Reader in Arithmetik wurde. 1967 wurde er Sadleirian Professor für Reine Mathematik in Cambridge. Ab 1969 war er auch Vorsitzender der Fakultät für Reine Mathematik und mathematische Statistik in Cambridge, was er bis zu seiner Emeritierung 1984 blieb. Cassels arbeitete unter anderem über die Geometrie der Zahlen, rationale quadratische Formen, die Arithmetik elliptischer Kurven (eine Serie von Arbeiten Arithmetic of Curves of Genus 1 im Journal of the London Mathematical Society und im Journal für die reine und angewandte Mathematik 1959 bis 1965), diophantische Approximation und lokale Körper. Er bewies beispielsweise, dass die Ordnung der Tate-Shafarevich-Gruppe eine Quadratzahl ist, falls sie endlich ist. Cassels ist seit 1963 Mitglied („Fellow“) der Royal Society, deren Sylvester-Medaille er 1973 erhielt. 1976 bis 1978 war er Präsident der London Mathematical Society, deren De-Morgan-Medaille er 1986 erhielt. Er ist seit 1981 Fellow der Royal Society of Edinburgh. 1978 bis 1982 war er im Rat der Internationalen Mathematischen Union. 1974 bis 1978 war er Vizepräsident der Royal Society in London. 1970 war er Invited Speaker auf dem Internationalen Mathematikerkongress in Nizza (On cubic trigonometric sums). (de) John William Scott "Ian" Cassels, FRS (11 July 1922 – 27 July 2015) was a British mathematician. (en) John William Scott Cassels (aussi connu sous le nom de Ian Cassels) né le 11 juillet 1922 à Durham et mort le 27 juillet 2015, est un mathématicien britannique spécialiste de théorie des nombres et de géométrie des nombres. (fr) 존 윌리엄 스콧 캐셀스(영어: John William Scott Cassels, 1922–)는 잉글랜드의 수학자다. 타원곡선론과 디오판토스 기하학에 기여하였고, 또 수많은 수학 교재를 저술하였다. (ko) John William Scott Cassels, também conhecido como Ian Cassels (Durham, 11 de julho de 1922 – 27 de julho de 2015), foi um matemático britânico. Foi Professor Sadleiriano de Matemática Pura da Universidade de Cambridge, de 1967 a 1986. Seus campos de pesquisa são a teoria dos números e geometria aritmético-algébrica. (pt) Джон Уи́льям Скотт Иэн Ка́сселс (англ. John William Scott Ian Cassels,1922—2015) — британский математик. Труды в области теории чисел (в том числе диофантовых приближений), эллиптических кривых, геометрии чисел, рациональных квадратичных форм, общей алгебре (локальные поля, абелевы группы). Его учебники оказали влияние на поколения математиков во всём мире; некоторые из книг Касселса активно используются десятилетиями. Член Лондонского королевского общества с 1963 года, лауреат медали Сильвестра (1973 год, «за многочисленные и существенные вклады в теорию чисел»), также был членом Эдинбургского королевского общества (1981). С 1976 по 1978 год Касселс был президентом Лондонского математического общества, чью медаль де Моргана получил в 1986 году; с 1974 по 1978 год он был вице-президентом Математического общества. В период 1975—1978 годов был вице-президентом Международного математического союза. (ru) |
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John William Scott "Ian" Cassels, FRS (11 July 1922 – 27 July 2015) was a British mathematician. (en) John William Scott Cassels (aussi connu sous le nom de Ian Cassels) né le 11 juillet 1922 à Durham et mort le 27 juillet 2015, est un mathématicien britannique spécialiste de théorie des nombres et de géométrie des nombres. (fr) 존 윌리엄 스콧 캐셀스(영어: John William Scott Cassels, 1922–)는 잉글랜드의 수학자다. 타원곡선론과 디오판토스 기하학에 기여하였고, 또 수많은 수학 교재를 저술하였다. (ko) John William Scott Cassels, também conhecido como Ian Cassels (Durham, 11 de julho de 1922 – 27 de julho de 2015), foi um matemático britânico. Foi Professor Sadleiriano de Matemática Pura da Universidade de Cambridge, de 1967 a 1986. Seus campos de pesquisa são a teoria dos números e geometria aritmético-algébrica. (pt) John William Scott Cassels, auch Ian Cassels, (* 11. Juni 1922 in Durham; † 27. Juli 2015) war ein britischer Mathematiker, der sich mit Zahlentheorie und arithmetisch-algebraischer Geometrie beschäftigte. (de) Джон Уи́льям Скотт Иэн Ка́сселс (англ. John William Scott Ian Cassels,1922—2015) — британский математик. Труды в области теории чисел (в том числе диофантовых приближений), эллиптических кривых, геометрии чисел, рациональных квадратичных форм, общей алгебре (локальные поля, абелевы группы). Его учебники оказали влияние на поколения математиков во всём мире; некоторые из книг Касселса активно используются десятилетиями. (ru) |
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John Cassels (de) J. W. S. Cassels (en) John Cassels (fr) 존 윌리엄 스콧 캐셀스 (ko) John Cassels (pt) Касселс, Джон (ru) |
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