Stability of depths of symbolic powers of Stanley-Reisner ideals

被引:20
作者
Le Than Hoa [1 ]
Kimura, Kyouko [2 ]
Terai, Naoki [3 ]
Tran Nam Trung [1 ]
机构
[1] VAST, Inst Math, 18 Hoang Quoc Viet, Hanoi 10307, Vietnam
[2] Shizuoka Univ, Fac Sci, Dept Math, Suruga Ku, 836 Ohya, Shizuoka 4228529, Japan
[3] Saga Univ, Fac Culture & Educ, Saga 8408502, Japan
关键词
Depth; Symbolic power; Stanley-Reisner ideal; Cover ideal; MONOMIAL IDEALS; PERSISTENCE; GRAPHS;
D O I
10.1016/j.jalgebra.2016.10.036
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
We give a bound for n(0)(I) from which the depth function depth R/I-(n) of the quotient ring by symbolic powers of a squarefree monomial ideal I stabilizes. In the unmixed corlimension two case we show that depth R/I-(n) is a non increasing function of n and use this property to provide a sharp bound for n(0)(I). (C) 2016 Elsevier Inc. All rights reserved.
引用
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页码:307 / 323
页数:17
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