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math.AT2000
Field theory and the Cohomology of Some Galois Groups
Alejandro Adem, Wenfeng Gao, Dikran Karagueuzian +1
We prove that two arithmetically significant extensions of a field F coincide if and only if the Witt ring WF is a group ring Z/n[G]. Furthermore, working modulo squares with Galoi…
math.AT1998
On the cohomology of Galois groups determined by Witt rings
Alejandro Adem, Dikran Karagueuzian, Jan Minac
Let F denote a field of characteristic different from two. In this paper we describe the mod 2 cohomology of a Galois group which is determined by the Witt ring WF.