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FROBENIUS ACTIONS ON LOCAL COHOMOLOGY MODULES AND DEFORMATION

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Let $(R,\mathfrak{m})$ be a Noetherian local ring of characteristic $p>0$ . We introduce and study $F$ -full and $F$ -anti-nilpotent singularities, both are defined in terms of the Frobenius actions… Click to show full abstract

Let $(R,\mathfrak{m})$ be a Noetherian local ring of characteristic $p>0$ . We introduce and study $F$ -full and $F$ -anti-nilpotent singularities, both are defined in terms of the Frobenius actions on the local cohomology modules of $R$ supported at the maximal ideal. We prove that if $R/(x)$ is $F$ -full or $F$ -anti-nilpotent for a nonzero divisor $x\in R$ , then so is $R$ . We use these results to obtain new cases on the deformation of $F$ -injectivity.

Keywords: frobenius actions; local cohomology; modules deformation; cohomology modules; actions local

Journal Title: Nagoya Mathematical Journal
Year Published: 2017

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