arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1707.04874math.ACmath.CO
收藏

非常好覆盖图的边理想幂的正则性

Regularity of Powers of edge ideal of very well-covered graphs

Pooran Norouzi, Seyed Amin Seyed Fakhari, Siamak Yassemi

摘要:

令$k\geq 3$为整数,$G$为具有${\rm odd-girth}(G)\geq 2k+1$的覆盖良好的图。假设$I(G)$是$G$的边理想。我们证明了对于每一个具有$1\leq s\leq k-2$的整数$s$,我们有${\rm reg}(I(G)^s)=2s+ν(G)-1$,其中$ν(G)$是$G$的诱导匹配数。

英文摘要:

Let $k\geq 3$ be an integer and $G$ be a very well-covered graph with ${\rm odd-girth}(G)\geq 2k+1$. Assume that $I(G)$ is the edge ideal of $G$. We show that for every integer $s$ with $1\leq s\leq k-2$, we have ${\rm reg}(I(G)^s)=2s+ν(G)-1$, where $ν(G)$ is the induced matching number of $G$.

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。

↑