English

Mixed multiplicities of arbitrary modules

Commutative Algebra 2011-09-26 v1

Abstract

Let (R,m)(R, \mathfrak m) 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 E,E1,...,EqE,E_1,..., E_q of RR-submodules of RpR^p with EE of finite colength. We prove that these mixed multiplicities coincide with the Buchsbaum-Rim multiplicity of some suitable RR-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 RR-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}
}

Comments

29 pages

R2 v1 2026-06-21T19:09:18.207Z