ARITHMETICAL RANK OF THE CYCLIC AND BICYCLIC GRAPHS

被引:12
作者
Barile, Margherita [1 ]
Kiani, Dariush [2 ]
Mohammadi, Fatemeh [2 ]
Yassemi, Siamak [3 ]
机构
[1] Univ Bari Aldo Moro, Dipartimento Matemat, I-70125 Bari, Italy
[2] Amirkabir Univ Technol, Dept Math, Tehran, Iran
[3] Univ Tehran, Dept Math, Tehran, Iran
关键词
Arithmetical rank; projective dimension; edge ideals; set-theoretic complete intersection ideals; IDEALS;
D O I
10.1142/S0219498811005634
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
We show that for the edge ideals of the graphs consisting of one cycle or two cycles of any length connected through a vertex, the arithmetical rank equals the projective dimension of the corresponding quotient ring.
引用
收藏
页数:14
相关论文
共 20 条
[1]  
Barile M., ARXIVMATHAC0606353
[2]  
BARILE M, 2009, TOKYO J MATH, V32, P435, DOI DOI 10.3836/TJM/1264170241
[3]   On ideals generated by monomials and one binomial [J].
Barile, Margherita .
ALGEBRA COLLOQUIUM, 2007, 14 (04) :631-638
[4]   On the Arithmetical Rank of the Edge Ideals of Forests [J].
Barile, Margherita .
COMMUNICATIONS IN ALGEBRA, 2008, 36 (12) :4678-4703
[5]  
Brodmann M. P., 1998, LOCAL COHOMOLOGY ALG
[6]  
Corso A, 2009, T AM MATH SOC, V361, P1371
[7]  
Emtander E., MATH SCAND IN PRESS
[8]   Splittable ideals and the resolutions of monomial ideals [J].
Ha, Huy Tai ;
Van Tuyl, Adam .
JOURNAL OF ALGEBRA, 2007, 309 (01) :405-425
[9]   COHOMOLOGICAL DIMENSION OF ALGEBRAIC VARIETIES [J].
HARTSHORNE, R .
ANNALS OF MATHEMATICS, 1968, 88 (03) :403-+
[10]  
Hochster M., 1975, Lecture Notes in Pure and Applied Mathematics, V26, P171