On the Frobenius stable part of Witt vector cohomology - Mathematics > Algebraic GeometryReport as inadecuate




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Abstract: For a proper not necessarily smooth variety over a finite field with qelements, Berthelot-Bloch-Esnault proved a trace formula which computes thenumber of rational points modulo q in terms of the Witt vector cohomology. Weshow the analogous formula for Witt vector cohomology of finite length. Inaddition, we prove a vanishing result for the compactly supported \-etalecohomology of a constant p-torsion sheaf on an affine Cohen-Macaulay variety inpositive characteristic p.



Author: Andre Chatzistamatiou

Source: https://arxiv.org/







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