Cohomological invariants mod 2 of Weyl groups

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arxiv 1805.07172 v1 pith:D2CQWBVC submitted 2018-05-18 math.AG

Jean-Pierre Serre This is my paper · ORCID

classification math.AG

keywords cohomologicalinvariantsweylclassesdescriptiongivegroupgroups

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We give a description of the cohomological invariants mod 2 of a Weyl group G in terms of the involution classes of G.

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On the splitting principle for cohomological invariants of reflection groups
math.AG 2019-08 conditional novelty 7.0 of 10

The splitting principle for cohomological invariants of finite orthogonal reflection groups with values in cycle modules, and for Witt and Milnor-Witt invariants, is proved over fields of characteristic coprime to the...