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arXiv · 2308.08122

Fano threefolds in positive characteristic II

Hiromu Tanaka
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Abstract

Let $X$ be a smooth Fano threefold over an algebraically closed field of positive characteristic. Assume that $|-K_X|$ is very ample and each of the index and the Picard number is equal to one. We prove that $3 \leq g \leq 12$ and $g \neq 11$ for the genus $g$ of $X$. Moreover, we show that there exists no smooth curve on $X$ along which the blowup is Fano.

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Hiromu Tanaka. 2023-08-16. Fano threefolds in positive characteristic II. https://arxiv.org/abs/2308.08122

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