Charles Ehresmann
Charles Ehresmann (19 April 1905 – 22 September 1979) was a German-born French mathematician who worked in differential topology and category theory.
Charles Ehresmann | |
|---|---|
Charles Ehresmann (right) at the topology conference 1949 in Oberwolfach, together with Paul Vincensini (middle) and Georges Reeb (left) | |
| Born | 19 April 1905 |
| Died | 22 September 1979 (aged 74) Amiens, Picardy, France |
| Nationality | French |
| Alma mater | École Normale Supérieure |
| Known for | Almost complex manifold Ehresmann's fibration theorem Ehresmann connection Jet bundle Lie groupoid Sketch Strict 2-category |
| Spouse | Andrée Ehresmann |
| Awards | Prix Francoeur |
| Scientific career | |
| Fields | Mathematics |
| Institutions | University of Strasbourg Paris Diderot University |
| Thesis | Sur la topologie de certains espaces homogènes (1934) |
| Doctoral advisor | Élie Cartan |
| Doctoral students |
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He was an early member of the Bourbaki group, and is known for his work on the differential geometry of smooth fiber bundles, notably the introduction of the concepts of Ehresmann connection and of jet bundles, and for his seminar on category theory.
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