Algebraic groups

Arason invariant

In mathematics, the Arason invariant is a cohomological invariant associated to a quadratic form of even rank and trivial discriminant and Clifford invariant over a field k of characteristic not 2, taking values in H3(k,Z/2Z). It was introduced by (Arason , Theorem 5.7). The Rost invariant is a generalization of the Arason invariant to other algebraic groups. (Wikipedia).

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Related pages

Rost invariant | Cup product | Pfister form | Galois cohomology | Quadratic form | Group homomorphism | Characteristic (algebra) | Group isomorphism | Mathematics | Field (mathematics) | Cohomological invariant | Discriminant | Milnor conjecture