KOSZULNESS OF VERTEX COVER ALGEBRAS OF BIPARTITE GRAPHS

被引:0
作者
Rinaldo, Giancarlo [1 ]
机构
[1] Univ Messina, Dipartimento Matemat, I-98166 Messina, Italy
关键词
Cohen-Macaulay; Edge ideal; Fiber cone; Koszul; Vertex cover;
D O I
10.1080/00927870903286884
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
Let G be a bipartite graph and let (A) over bar (G) be the fiber cone of the Alexander dual of the edge ideal. We show that when (A) over bar (G) is a domain then (A) over bar (G) is Koszul. We also give new characterizations of unmixed and Cohen-Macaulay bipartite graphs.
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页码:2249 / 2259
页数:11
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