Cahiers de Topologie et Géométrie Différentielle Catégoriques
The Cahiers de Topologie et Géométrie Différentielle Catégoriques is a French mathematical scientific journal established by Charles Ehresmann in 1957. It concentrates on category theory "and its applications, specially in topology and differential geometry". Its older papers are freely available on the internet through the French NUMDAM service.
It was originally published by the Institut Henri Poincaré under the name Cahiers de Topologie; after the first volume, Ehresmann changed the publisher to the Institut Henri Poincaré and later Dunod/Bordas. In the eighth volume he changed the name to Cahiers de Topologie et Géométrie Différentielle. After Ehresmann's death in 1979 the editorship passed to his wife Andrée C. Ehresmann; in 1984, at the suggestion of René Guitart, the name was changed again, to add "Catégoriques".
