Charles Ehresmann
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| Charles Ehresmann | |
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 Charles Ehresmann (right) at the topology conference 1949 in Oberwolfach, together with Paul Vincensini (middle) and Georges Reeb (left)
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| Born | 19 April 1905 Straßburg, Alsace-Lorraine, German Empire (today Strasbourg, Alsace, France) |
| Died | 22 September 1979 (aged 74) Amiens, Picardy, France |
| Fields | Mathematics |
| Alma mater | École Normale Supérieure |
| Doctoral advisor | Élie Cartan |
| Doctoral students | Georges Reeb Wu Wen-Tsün André Haefliger Valentin Poénaru Daniel Tanré |
| Known for | Ehresmann's theorem Ehresmann connection |
Charles Ehresmann (19 April 1905 – 22 September 1979) was a French mathematician who worked on differential topology and category theory. He is known for work on the topology of Lie groups, the jet concept (see jet bundle), and his seminar on category theory.
He attended the École Normale Supérieure in Paris before performing one year of military service. He finished his PhD thesis Sur la topologie de certains espaces homogènes (French: On the topology of certain homogeneous spaces) in 1934 under the supervision of Élie Cartan.
In 1957 he founded the mathematical journal Cahiers de Topologie et Géometrie Différentielle Categoriques.
Jean Dieudonné describes Ehresmann's personality as "... distinguished by forthrightness, simplicity, and total absence of conceit or careerism. As a teacher he was outstanding, not so much for the brilliance of his lectures as for the inspiration and tireless guidance he generously gave to his research students ... "
He had 76 Ph.D. students, including Georges Reeb, Wu Wen-Tsün, André Haefliger, Valentin Poénaru, Daniel Tanré.
[edit] See also
[edit] References
- International Conference "Charles Ehresmann : 100 ans", Université de Picardie Jules Verne à Amiens, 7-8-9 October 2005, http://pagesperso-orange.fr/vbm-ehr/ChEh/indexAng.htm
- `The mathematical legacy of Charles Ehresmann', Proceedings of the 7th Conference on the Geometry and Topology of Manifolds: The Mathematical Legacy of Charles Ehresmann, Bedlewo (Poland) 8.05.2005-15.05.2005, Edited by J. Krysinski, J. Pradines, T. Rybicki, R. Wolak, Banach Centre Publications 76, Institute of Mathematics Polish Academy of Sciences, Warsaw, (2007).
[edit] External links
- O'Connor, John J.; Robertson, Edmund F., "Charles Ehresmann", MacTutor History of Mathematics archive, University of St Andrews, http://www-history.mcs.st-andrews.ac.uk/Biographies/Ehresmann.html.
- Charles Ehresmann at the Mathematics Genealogy Project.
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