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arXiv 1111.6157math.ACmath.CO
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边理想的幂

Powers of edge ideals

Carmela Ferro, Mariella Murgia, Oana Olteanu

摘要:

我们计算的贝蒂数的所有权力的初始和最终lexsegment边缘理想。对于反$d-$路的边理想的幂,我们证明了它们具有线性幂元,并刻画了正常无挠理想。我们确定了一类非squarefree理想,产生于一些特殊的图,这通常是挠自由。

英文摘要:

We compute the Betti numbers for all the powers of initial and final lexsegment edge ideals. For the powers of the edge ideal of an anti-$d-$path, we prove that they have linear quotients and we characterize the normally torsion-free ideals. We determine a class of non-squarefree ideals, arising from some particular graphs, which are normally torsion-free.

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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