A degree map on unimodular rows

Abstract

We associate to any endomorphism of the punctured affine space over some field an element in the Witt group of the base field that we call degree. We use this degree to give a counter-example to a question on unimodular rows

Final version; J. Ramanujan Math. Soc. 27 (2012), no 1

References in corpus (1)

• Push-forwards for Witt groups of schemes

Cited by in corpus (1)

• A cohomological classification of vector bundles on smooth affine threefolds