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arxiv: 1112.2383 · v2 · pith:S56S5P2Snew · submitted 2011-12-11 · 🧮 math.AG · math.AC

On the F-purity of isolated log canonical singularities

classification 🧮 math.AG math.AC
keywords densef-pureisolatedtypecanonicaldefinitionprovesingularities
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A singularity in characteristic zero is said to be of dense F-pure type if its modulo p reduction is locally F-split for infinitely many p. We prove that if $x \in X$ is an isolated log canonical singularity with $\mu(x \in X) \le 2$ (see Definition 1.4 for the definition of the invariant $\mu$), then it is of dense F-pure type. As a corollary, we prove the equivalence of log canonicity and being of dense F-pure type in the case of three-dimensional isolated singularities.

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