Let G be a finite algebraic group, defined over an algebraically closed field k of characteristic p>0. Such a group decomposes into a semidirect product G=G 0 \_G red with a constant group G red and a normal infinitesimal subgroup G 0 . If the principal block B 0 (G) of the group algebra H(G) has fi
A Note on the Cohomology of Finite-Dimensional Cocommutative Hopf Algebras
✍ Scribed by John H. Palmieri
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 162 KB
- Volume
- 188
- Category
- Article
- ISSN
- 0021-8693
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✦ Synopsis
In the context of finite-dimensional cocommutative Hopf algebras, we prove versions of various group cohomology results: the Quillen᎐Venkov theorem on detecting nilpotence in group cohomology, Chouinard's theorem on determining whether a kG-module is projective by restricting to elementary abelian p-subgroups of G, and Quillen's theorem which identifies the cohomology of G, ''modulo nilpotent elements.'' This last result is only proved for graded connected Hopf algebras.
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