Talk:Cohomological invariant

Examples
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)