Samuel ‘Sammy’ Eilenberg (1913-1998) was one of the founders of category theory, with Saunders Mac Lane. Their 1945 paper General Theory of Natural Equivalences introduced category theory with the notions of categories, functors and natural transformations, motivated by formalizing the concept of dual objects.
Further with Eilenberg he developed of the strong links with group theory and group cohomology.
Hyman Bass, Henri Cartan, Peter Freyd, Alex Heller, Saunders Mac Lane:
Samuel Eilenberg (1913–1998),
Notices of the AMS 45 9 (Oct 1998) 1344-1352 [pdf]
Alex Heller (1950)
Kuo Tsai Chen (1950)
David Buchsbaum (1954)
Daniel Kan (1955)
William Lawvere (1963)
Harry Applegate (1965)
Myles Tierney (1965)
Jonathan Beck (1967)
On group extensions and group homology via Ext/Tor-functors:
Introducing category theory:
Introducing the Eilenberg-Steenrod axioms for ordinary cohomology:
Introducing abstract group cohomology:
Introducing simplicial sets and semi-simplicial sets (see the historical remarks here):
Introducing the Eilenberg-Zilber theorem:
Introducing Eilenberg-MacLane spaces:
Samuel Eilenberg, Saunders Mac Lane, On the Groups , I, Annals of Mathematics Second Series, Vol. 58, No. 1 (Jul., 1953), pp. 55-106 (jstor:1969820)
Samuel Eilenberg, Saunders Mac Lane, On the Groups , II: Methods of Computation, Annals of Mathematics Second Series, Vol. 60, No. 1 (Jul., 1954), pp. 49-139 (jstor:1969702)
Samuel Eilenberg, Saunders Mac Lane, On the Groups , III: Operations and Obstructions, Annals of Mathematics Second Series, Vol. 60, No. 3 (Nov., 1954), pp. 513-557 (jstor:1969849)
On separable algebras and Frobenius algebras:
Introducing the notion of closed categories:
Last revised on May 15, 2025 at 08:48:56. See the history of this page for a list of all contributions to it.