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Stiefel-Whitney Classes of a Symmetric Bilinear Form — A Formula of Serre
Published online by Cambridge University Press: 20 November 2018
Abstract
Let K be a field of characteristic different from two. Let L be a finite separable extension of K. If is the separable closure of K, we have a continuous homomorphism π : Ga(/K) → ∑n(n - [L : K]). We give a very short proof of Serre's formula which evaluates the Hasse-Witt invariant of a symmetric bilinear form, transferred from L, in terms of the topological Stiefel-Whitney classes of IT.
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- Copyright © Canadian Mathematical Society 1985
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