The Multiplicity Conjecture for Barycentric Subdivisions

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For a simplicial complex $Δ$ we study the effect of barycentric subdivision on ring theoretic invariants of its Stanley-Reisner ring. In particular, for Stanley-Reisner rings of barycentric subdivisions we verify a conjecture by Huneke and Herzog & Srinivasan, that relates the multiplicity of a standard graded $k$-algebra to the product of the maximal and minimal shifts in its minimal free resolution up to the height. On the way to proving the conjecture we develop new and list well known results on behavior of dimension, Hilbert series, multiplicity, local cohomology, depth and regularity when passing from the Stanley-Reisner ring of $Δ$ to the one of its barycentric subdivision.
28, pages, lower bound and equality cases added

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Commutative Algebra, Combinatorics, 13D02, 05E99

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http://salesiana.dossiersoluciones.com/handle/123456789/128838

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0606274
 http://arxiv.org/abs/math/0606274

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arXiv