Author : Mikhail Borovoi
Publisher : American Mathematical Soc.
Page : 50 pages
File Size : 43,8 Mb
Release : 1998
Category : Mathematics
ISBN : 9780821806500
Abelian Galois Cohomology of Reductive Groups by Mikhail Borovoi Pdf
In this volume, a new functor $H^2_{ab}(K,G)$ of abelian Galois cohomology is introduced from the category of connected reductive groups $G$ over a field $K$ of characteristic $0$ to the category of abelian groups. The abelian Galois cohomology and the abelianization map$ab^1:H^1(K,G) \rightarrow H^2_{ab}(K,G)$ are used to give a functorial, almost explicit description of the usual Galois cohomology set $H^1(K,G)$ when $K$ is a number field.