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Regularity and $h$-polynomials of edge ideals
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Regularity and $h$-polynomials of edge ideals

Abstract

For any two integers $d,r \geq 1$, we show that there exists an edge ideal $I(G)$ such that the ${\rm reg}\left(R/I(G)\right)$, the Castelnuovo-Mumford regularity of $R/I(G)$, is $r$, and ${\rm deg} (h_{R/I(G)}(t))$, the degree of the $h$-polynomial of $R/I(G)$, is $d$. Additionally, if $G$ is a graph on $n$ vertices, we show that ${\rm reg}\left(R/I(G)\right) + {\rm deg} (h_{R/I(G)}(t)) \leq n$.

Authors

Hibi T; Matsuda K; Van Tuyl A

Publication date

October 16, 2018

DOI

10.48550/arxiv.1810.07140

Preprint server

arXiv
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