On the local étale fundamental group of KLT threefold singularities

Published 16 Apr 2020 in math.AG | (2004.07628v3)

Abstract: Let $S$ be KLT threefold singularity over an algebraically closed field of positive characteristic $p>5$. We prove that its local \'etale fundamental group is tame and finite. Further, we show that every finite unipotent torsor over a big open of $S$ is realized as the restriction of a finite unipotent torsor over $S$.

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