the Arason invariant is a cohomological invariant associated to a quadratic form of even rank and trivial discriminant and Clifford invariant over a...

dimension 2 it is essentially the Hasse−Witt invariant. The Arason invariant e3 is a dimension 3 invariant of some even dimensional quadratic forms q with...

work that was summarized by Serre (1995). The Rost invariant is a generalization of the Arason invariant. Suppose that G is an absolutely almost simple simply...