Talk:Cohomological invariant
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Examples
[edit]If cohomological invariant is defined as an invariant of an algebraic group, then presumably Arason invarianbt should be described as an invariant of the Spin group, as here, where Stiefel-Whitney class and Merkurjev-Suslin invariant are also given as examples. Deltahedron (talk) 20:09, 26 May 2014 (UTC)