arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2412.03468math.AC
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具有线性商的边理想的幂

Powers of Edge Ideals with Linear Quotients

Etan Basser, Rachel Diethorn, Robert Miranda, Mario Stinson-Maas

AI总结:

该研究证明反圈边理想的高次幂具有线性商序,解决了公开问题,构造了二次单项式理想幂的显式线性商序,并推出须图边理想的投射维数和Betti数公式。

摘要:

我们证明了反圈的边理想的二次及更高次幂容许线性商序,尽管这些边理想本身并不具有线性商序,从而肯定地解决了Hoefel和Whieldon提出的一个公开问题,并给出了第一类无间隙图,其边理想的幂满足该性质。我们还为任意具有线性商的二次单项式理想的任意次幂构造了一种显式且直接的线性商序,这拓展了Herzog、Hibi与Zheng的一个著名结果。作为推论,我们给出了须图边理想的投射维数和Betti数的显式公式。

英文摘要:

We prove that second and higher powers of the edge ideals of anticycles admit linear quotient orderings, although the edge ideals themselves do not, thus resolving an open question of Hoefel and Whieldon in the affirmative and providing the first class of gap-free graphs whose edge ideals satisfy this property on their powers. We also construct an explicit and straightforward linear quotient ordering for any power of a quadratic monomial ideal which admits linear quotients. This expands on a well-known result of Herzog, Hibi, and Zheng. As a consequence, we give explicit formulas for the projective dimension and Betti numbers of the edge ideals of whisker graphs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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