|This article may be expanded with text translated from the corresponding article in the German Wikipedia. (March 2010)|
19 April 1905|
Straßburg, Alsace-Lorraine, German Empire (today Strasbourg, Alsace, France)
|Died||22 September 1979
Amiens, Picardy, France
|Alma mater||École Normale Supérieure|
|Doctoral advisor||Élie Cartan|
|Doctoral students||Jacques Feldbau
|Known for||Ehresmann's theorem
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 ... "
- Michèle Audin
- 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 May 2005, Edited by J. Krysinski, J. Pradines, T. Rybicki, R. Wolak, Banach Centre Publications 76, Institute of Mathematics Polish Academy of Sciences, Warsaw, (2007).
- O'Connor, John J.; Robertson, Edmund F., "Charles Ehresmann", MacTutor History of Mathematics archive, University of St Andrews.
- Charles Ehresmann at the Mathematics Genealogy Project
- Michèle Audin, Publier sous l’Occupation. Autour du cas de Jacques Feldbau et de l’académie des sciences
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