中文

行列式面理想初始理想的线性链

交换代数 2022-01-27 v2

摘要

行列式面理想(DFI)是一个由通用矩阵极大子式生成的理想JΔJ_\Delta,这些子式由相伴单纯复形Δ\Delta参数化。本文中,我们针对任意DFI关于任意对角项序<<的初始理想构造了显式的线性链。特别地,我们证明若Δ\Delta没有\emph{1-非面},则JΔJ_\Delta的线性链与其初始理想的Betti数重合。我们应用该结果证明了Ene、Herzog与Hibi关于闭二项边理想Betti数的猜想在相伴图至多含22个极大团的情形下成立。更一般地,我们证明\emph{任意}DFI的初始理想(关于<<)的线性链支撑于一个多面体胞腔复形,该复形作为Nagel与Reiner引入的\emph{盒复形}的诱导子复形得到。

关键词

引用

@article{arxiv.2101.07279,
  title  = {Linear Strands of Initial Ideals of Determinantal Facet Ideals},
  author = {Ayah Almousa and Keller VandeBogert},
  journal= {arXiv preprint arXiv:2101.07279},
  year   = {2022}
}

备注

16 pages; v2: added revisions in line with referee comments + DOI for published version. v1: significantly expanded version of contents originally appearing in 2006.14434. arXiv admin note: text overlap with arXiv:2006.14434