Person: Ehresmann, Charles

Charles Ehresmann was a French mathematician who worked in differential topology and category theory.

Charles, however, was from that time on taught in French.
In 1924 Ehresmann entered the École Normale Supérieure in Paris.
After spending the years 1928-29 in Rabat, Ehresmann continued his education going to Göttingen to undertake research.
From 1932 to 1934 Ehresmann studied at Princeton in the United States.
Ehresmann's doctorate was awarded by Paris in 1934.
Ehresmann followed the moves of the university then, in 1955, a chair of topology was specially created for him in the University of Paris.
Ehresmann was one of the creators of differential topology.
Beginning in 1941, Ehresmann made major contributions toward establishing the current view of fibre spaces, manifolds, foliations and jets.
After 1957 Ehresmann became a leader in category theory and he worked in this area for 20 years.
Between 1980 and 1983 Andrée Charles Ehresmann, his wife, edited his complete works.
These appeared in seven volumes: Charles Ehresmann: Oeuvres complètes et commentées Ⓣ(Charles Ehresmann: Complete Works and commentaries) as supplements to the Journal Cahiers de Topologie et Géometrie Différentielle Categoriques which Charles Ehresmann created in 1957.

Born 19 April 1905, Strasbourg, Alsace (now France). Died 22 September 1979, Amiens France.

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O’Connor, John J; Robertson, Edmund F: MacTutor History of Mathematics Archive