Charles Pisot

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Charles Pisot (born March 2, 1910 in Oberehnheim , † March 7, 1984 in Paris ) was a French number theorist.

Life

Pisot studied from 1929 at the École normal supérieure in Paris (graduating in 1932, where he was the best in the competition for the Agrégation ) and received his doctorate in 1938 with Arnaud Denjoy (La répartition modulo 1 et les nombres algébriques). Then he worked as a high school teacher. In the 1940s he sought a professorship in Alsace, which was occupied by Germany (he was a native of Alsace), but this failed because of his French citizenship (despite the advocacy of Wilhelm Süss ). From 1946 he was maître de conférences and from 1948 professor at the University of Bordeaux . In 1955 he received a professorship at the Faculté des Sciences in Paris, where he led a number theory and algebra seminar founded by Albert Châtelet with Paul Dubreil . This was followed from 1960 by the DPP (Delange-Pisot-Poitou) seminar with Hubert Delange (1913–2003) and Georges Poitou (1926–1989). In 1979 he retired. In addition to his professorship, he was also maître de conférences at the École polytechnique .

He was a member of Bourbaki . In 1966 he received the Paris Grand Prize from the French Academy of Sciences . In 1969 he was President of the Société Mathématique de France .

He had numerous students. His PhD students include Yvette Amice , Jean-Marc Deshouillers and Gérard Rauzy .

Act

Pisot dealt with number theory, which at that time was severely neglected in France and which Pisot revived there with his seminar. In his dissertation, he introduced the pisot numbers named after him , which he later examined in detail (he never called them pisot numbers, usually they were referred to as class S numbers), as well as their relatives, in the 1940s by Raphaël Salem (who discovered the connection with harmonic analysis) introduced Salem numbers (referred to as class T numbers).

Pisot's textbook Mathématiques Générales with Marc Zamansky was widespread in France in the 1960s and 1970s.

literature

  • Amice, Bertin, Bertrandias, Decomps, Dress, Grandet, Mendès-France, Rauzy: Charles Pisot, Acta Arithmetica , vol. 51, 1988, p. 1, online here PDF file
  • Marie-José Bertin, Annette Decomps-Guilloux, Marthe Grandet-Hugot, Martine Pathiaux-Delefosse, Jean-Pierre Schreiber: Pisot and Salem Numbers, Birkhäuser 1992 (monograph, written by former students of Pisot)
  • Pisot: La répartition modulo 1 et les nombres algébriques , Annali Scuola Normale Superiore Pisa, Series 2, Vol. 7, 1938, pp. 205–248 (dissertation), online here in published form [1] and here as a dissertation in 1938
  • Pisot, Marc Zamansky: Mathématiques Générales, Paris, Dunod, 1959, 2nd edition 1972

Web links

References

  1. ^ Sanford Segal Mathematicians under the Nazis, Princeton University Press, 2003, p. 486
  2. ↑ However, they appeared previously in work by Axel Thue and Hardy on
personal data
SURNAME Pisot, Charles
BRIEF DESCRIPTION French mathematician
DATE OF BIRTH March 2, 1910
PLACE OF BIRTH Obernai
DATE OF DEATH March 7, 1984
Place of death Paris