arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1102.2243math.AC
收藏

刚性单项理想

Rigid monomial ideals

Timothy B. P. Clark, Sonja Mapes

摘要:

本文研究了刚性单项理想类。我们给出了这些理想的某些类的极小自由分解的特征。具体地说,我们证明了刚性单项理想的一个特殊子类中的理想是格线性的,因此它们的最小分解可以构造为偏序集分解。然后,我们使用这个结果给出了一个更大的一类刚性单项式理想的最小自由分解的描述,通过使用$\mathcal{L}(n)$,格的所有lcm-格的单项式理想与$n$发电机。通过在$\mathcal{L}(n)$中固定一个层,使得所有理想具有相同的总贝蒂数,我们证明了刚性是$\mathcal{L}(n)$中向上封闭的性质.进一步证明了包含在固定层中的所有刚性理想的最小分解同构于所构造的最小分解。

英文摘要:

In this paper we investigate the class of rigid monomial ideals. We give a characterization of the minimal free resolutions of certain classes of these ideals. Specifically, we show that the ideals in a particular subclass of rigid monomial ideals are lattice-linear and thus their minimal resolution can be constructed as a poset resolution. We then use this result to give a description of the minimal free resolution of a larger class of rigid monomial ideals by using $\mathcal{L}(n)$, the lattice of all lcm-lattices of monomial ideals with $n$ generators. By fixing a stratum in $\mathcal{L}(n)$ where all ideals have the same total Betti numbers we show that rigidity is a property which is upward closed in $\mathcal{L}(n)$. Furthermore, the minimal resolution of all rigid ideals contained in a fixed stratum is shown to be isomorphic to the constructed minimal resolution.

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。

↑