Duality between Cartier crystals and perverse $\mathbb{F}_p$-sheaves, and application to generic vanishing
Algebraic Geometry
2025-06-17 v2
Abstract
We show that on any Noetherian -finite -scheme, there is an anti-equivalence of categories between Cartier crystals and \'etale perverse -sheaves, commuting with derived proper pushforwards. We use this duality to construct an upper shriek functor for Cartier crystals, and give new proofs of Kashiwara's equivalence and the finite length of Cartier crystals. Finally, we deduce a generic vanishing statement for perverse -sheaves on abelian varieties of characteristic , reminiscent of the characteristic zero and -adic statements.
Keywords
Cite
@article{arxiv.2306.05378,
title = {Duality between Cartier crystals and perverse $\mathbb{F}_p$-sheaves, and application to generic vanishing},
author = {Jefferson Baudin},
journal= {arXiv preprint arXiv:2306.05378},
year = {2025}
}
Comments
Comments are more than welcome! Version 2: Added references and corrected typos and minor erros