Local Homology and Local Cohomology

Details Local Homology and Local Cohomology Local Homology and Local Cohomology

2004-11-20

arxiv.org/abs/math/0411450v1

Mathematics

Commutative Algebra

10 pages

Scientific paper

Let $(R, {\frak m})$ be a local ring, $I$ a proper ideal of $R$ and $M$ a finitely generated $R$-module of dimension $d$. We discuss the local homology modules of $H^d_I(M)$. When $M$ is Cohen-Macaulay, it is proved that $H^d_{{\frak m}}(M)$ is co-Cohen-Macaulay of N.dimension $d$ and $H^{\underline{x}}_d(H^d_{{\frak m}}(M))\cong\hat{M}$ where $\underline{x}=(x_1,...,x_d)$ is a system of parameters for $M$.

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