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On graded local cohomology modules defined by a pair of ideals (1502.04970v1)

Published 17 Feb 2015 in math.AC

Abstract: Let $R = \bigoplus_{n \in \mathbb{N}{0}} R{n}$ be a standard graded ring, $M$ be a finite graded $R$-module and $J$ be a homogenous ideal of $R$. In this paper we study the graded structure of the $i$-th local cohomology module of $M$ defined by a pair of ideals $(R_{+},J)$, i.e. $H^{{i}{R{+},J}(M)$.} More precisely, we discuss finiteness property and vanishing of the graded components $H^{{i}{R{+},J}(M)_{n}$.} Also, we study the Artinian property and tameness of certain submodules and quotient modules of $H^{{i}{R{+},J}(M)$.}