Mixed multiplicities of arbitrary modules
Abstract
Let be a Noetherian local ring. In this work we extend the notion of mixed multiplicities of modules, given in \cite{Kleiman-Thorup2} and \cite{Kirby-Rees1} (see also \cite{Bedregal-Perez}), to an arbitrary family of -submodules of with of finite colength. We prove that these mixed multiplicities coincide with the Buchsbaum-Rim multiplicity of some suitable -module. In particular, we recover the fundamental Rees's mixed multiplicity theorem for modules, which was proved first by Kirby and Rees in \cite{Kirby-Rees1} and recently also proved by the authors in \cite{Bedregal-Perez}. Our work is based on, and extend to this new context, the results on mixed multiplicities of ideals obtained by Vi\^et in \cite{Viet8} and Manh and Vi\^et in \cite{Manh-Viet}. We also extend to this new setting some of the main results of Trung in \cite{Trung} and Trung and Verma in \cite{Trung-Verma1}. As in \cite{Kleiman-Thorup2}, \cite{Kirby-Rees1} and \cite{Bedregal-Perez}, we actually work in the more general context of standard graded -algebras.
Keywords
Cite
@article{arxiv.1109.5055,
title = {Mixed multiplicities of arbitrary modules},
author = {R. Callejas-Bedregal and V. H. Jorge Pérez},
journal= {arXiv preprint arXiv:1109.5055},
year = {2011}
}
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29 pages