POLYMATROIDAL IDEALS AND LINEAR RESOLUTION

Bandari, Somayeh

doi:10.22044/jas.2022.11950.1610

Document Type : Original Manuscript

Author

Somayeh Bandari

Department of Mathematics, Buein Zahra Technical University, Buein Zahra, Qazvin, Iran.

https://doi.org/10.22044/jas.2022.11950.1610

Abstract

Let $S=K[x_1,\ldots,x_n]$ be a polynomial ring over a field $K$ and
$I\subset S$ be a monomial ideal with a linear
resolution. Let
$\frak{m}=(x_1,\ldots,x_n)$ be the unique homogeneous maximal ideal and $I\frak{m}$ be a
polymatroidal ideal. We prove that if either $I\frak{m}$ is polymatroidal with strong
exchange property, or $I$ is a monomial ideal in at most 4
variables, then $I$ is polymatroidal. We also show that the first
homological shift ideal of polymatroidal ideal is again
polymatroidal.

Keywords

References

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