Stable Birational Equivalence and Geometric Chevalley-Warning

Details Stable Birational Equivalence and Geometric Chevalley-Warning Stable Birational Equivalence and Geometric Chevalley-Warning

2011-10-12

arxiv.org/abs/1110.2554v1

Mathematics

Algebraic Geometry

Scientific paper

We propose a 'geometric Chevalley-Warning' conjecture, that is a motivic extension of the Chevalley-Warning theorem in number theory. It is equivalent to a particular case of a recent conjecture of F. Brown and O.Schnetz. In this paper, we show the conjecture is true for linear hyperplane arrangements, quadratic and singular cubic hypersurfaces of any dimension, and cubic surfaces in $\Pbb^3$. The last section is devoted to verifying the conjecture for certain special kinds of hypersurfaces of any dimension. As a by-product, we obtain information on the Grothendieck classes of the affine 'Potts model' hypersurfaces considered in \cite{aluffimarcolli1}.

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