On Frobenius liftability of surface singularities

Tatsuro Kawakami; Teppei Takamatsu

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arXiv · 2402.08152

On Frobenius liftability of surface singularities

Tatsuro Kawakami·Teppei Takamatsu

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Abstract

We show that a plt surface singularity $(P\in X,B)$ is $F$-liftable if and only if it is $F$-pure and is not a rational double point of type $E_8^1$ in characteristic $p=5$. As a consequence, we prove the logarithmic extension theorem for $F$-pure surface pairs and Bogomolov-Sommese vanishing for globally $F$-split surface pairs. These results were previously known to hold in characteristic $p>5$.

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Tatsuro Kawakami, Teppei Takamatsu. 2024-02-13. On Frobenius liftability of surface singularities. https://arxiv.org/abs/2402.08152

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