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arXiv · 2011.04846

Projective and affine structures in positive characteristic I: Chern class formulas and Characterizations of projective spaces

Yasuhiro Wakabayashi
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Abstract

This paper aims to develop a theory of projective and affine structures on higher-dimensional varieties in positive characteristic. This theory deals with Frobenius-projective and Frobenius-affine structures, which have been previously investigated in the case where the underlying space is a curve. We first provide a description of such structures in terms of Berthelot's higher-level differential operators. That description leads us to obtain a positive characteristic version of Gunning's formulas, which give necessary conditions on Chern classes for the existence of Frobenius-projective and Frobenius-affine structures, respectively. Finally, we establish some characterizations of projective spaces using Frobenius-projective structures.

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Yasuhiro Wakabayashi. 2020-11-10. Projective and affine structures in positive characteristic I: Chern class formulas and Characterizations of projective spaces. https://arxiv.org/abs/2011.04846

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