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Comparison between regularity of small symbolic powers and ordinary powers of an edge ideal
Journal of Combinatorial Theory Series A ( IF 0.9 ) Pub Date : 2022-03-22 , DOI: 10.1016/j.jcta.2022.105621
Nguyen Cong Minh 1 , Le Dinh Nam 2 , Thieu Dinh Phong 3 , Phan Thi Thuy 1 , Thanh Vu 4
Affiliation  

Let I=I(G) be the edge ideal of a simple graph G. We prove thatreg(I(s))=reg(Is) for s=2,3, where I(s) is the s-th symbolic power of I. As a consequence, we prove the following boundsregIsregI+2s2, for s=2,3,regI(s)regI+2s2, for s=2,3,4.



中文翻译:

边理想的小符号幂与普通幂的规律性比较

一世=一世(G)是简单图G的理想边。我们证明注册(一世(s))=注册(一世s)为了s=2,3, 在哪里一世(s)I的第s次符号幂。因此,我们证明了以下界限注册一世s注册一世+2s-2, 为了 s=2,3,注册一世(s)注册一世+2s-2, 为了 s=2,3,4.

更新日期:2022-03-22
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