Monomial Resolutions
alg-geom
2008-02-03 v1 Algebraic Geometry
Abstract
Call a monomial ideal M "generic" if no variable appears with the same nonzero exponent in two distinct monomial generators. Using a convex polytope first studied by Scarf, we obtain a minimal free resolution of M. Any monomial ideal M can be made generic by deformation of its generating exponents. Thus, the above construction yields a (usually nonminimal) resolution of M for arbitrary monomial ideals, bounding the Betti numbers of M in terms of the Upper Bound Theorem for Convex Polytopes. We show that our resolutions are DG-algebras, and consider realizability questions and irreducible decompositions.
Cite
@article{arxiv.alg-geom/9610012,
title = {Monomial Resolutions},
author = {Dave Bayer and Irena Peeva and Bernd Sturmfels},
journal= {arXiv preprint arXiv:alg-geom/9610012},
year = {2008}
}
Comments
plain TeX, 20 pages with 5 figures, Postscript file available from ftp://math.columbia.edu/pub/bayer/monomial_resolutions/monres.ps