Grothendieck-Witt groups of some singular schemes

Published 16 Apr 2020 in math.AG and math.AT | (2004.07779v1)

Abstract: We establish some structural results for the Witt and Grothendieck-Witt groups of schemes over $\mathbb{Z}[1/2]$, including homotopy invariance for Witt groups and a formula for the Witt and Grothendieck-Witt groups of punctured affine spaces over a scheme. All these results hold for singular schemes and at the level of spectra.

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