Jean Giraud (; 2 February 1936 – 27 or 28 March 2007)
, Philippe Gillet, ''ENS Info'' 70, April 2007. was a French mathematician, a student of

Alexander Grothendieck Alexander Grothendieck, later Alexandre Grothendieck in French (; ; ; 28 March 1928 – 13 November 2014), was a German-born French mathematician who became the leading figure in the creation of modern algebraic geometry. His research ext ...

. His research focused on non-abelian

cohomology In mathematics, specifically in homology theory and algebraic topology, cohomology is a general term for a sequence of abelian groups, usually one associated with a topological space, often defined from a cochain complex. Cohomology can be viewed ...

and the theory of

topoi In mathematics, a topos (, ; plural topoi or , or toposes) is a category that behaves like the category of sheaves of sets on a topological space (or more generally, on a site). Topoi behave much like the category of sets and possess a notion ...

. In particular, he authored the book ''Cohomologie non-abélienne'' (Springer, 1971) and proved the theorem that bears his name, which gives a characterization of a Grothendieck topos. From 1969 to 1989, he was a professor at

École normale supérieure de Saint-Cloud École or Ecole may refer to: * an elementary school in the French educational stages normally followed by secondary education establishments (collège and lycée) * École (river), a tributary of the Seine flowing in région Île-de-France * Éco ...

. From 1993 to 1994, he was deputy director for research of École normale supérieure de Lyon, where he was made interim director in 1994 and director from 1995 to 2000.

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Jean Giraud, 1936–
at

Library of Congress The Library of Congress (LOC) is a research library in Washington, D.C., serving as the library and research service for the United States Congress and the ''de facto'' national library of the United States. It also administers Copyright law o ...

Authorities – with 4 catalogue records 1936 births 2007 deaths French mathematicians University of Paris alumni Place of birth missing Place of death missing {{France-mathematician-stub

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