On injective resolutions of local cohomology modules

preprint2013arXivOpen access

Abstract

Let KK be a field of characteristic zero and let R=K[X1,…,Xn]R = K[X_1,\ldots,X_n]. Let II be an ideal in RR and let M=HIi(R)M = H^i_I(R) be the ithi^{th}-local cohomology module of RR with respect to II. Let c= injdim Mc = \ injdim \ M. We prove that if PP is a prime ideal in RR with Bass number μc(P,M)>0μ_c(P,M) > 0 then PP is a maximal ideal in RR.

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