A sign pattern matrix is the matrix whose entries come from the set {+, -, 0). For A is an element of Q(n), there exist the associated digraph D(A) and the associated signed digraph S(A). In this paper, we study the bounds on the base of primitive non-powerful digraphs with two simple ycles. We obtain lower bounds, together with characterization of the equality cases of the base for primitive digraphs.
机构:
Yancheng Teachers Univ, Dept Math, Yancheng 224002, Jiangsu, Peoples R China
E China Normal Univ, Dept Math, Shanghai 200241, Peoples R ChinaYancheng Teachers Univ, Dept Math, Yancheng 224002, Jiangsu, Peoples R China
Yu, Guanglong
Miao, Zhengke
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机构:
Xuzhou Normal Univ, Dept Math, Xuzhou 221116, Peoples R ChinaYancheng Teachers Univ, Dept Math, Yancheng 224002, Jiangsu, Peoples R China
Miao, Zhengke
Yan, Chao
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Univ Sci & Technol, Dept Math & Phys, Pla Nanjing 211101, Peoples R ChinaYancheng Teachers Univ, Dept Math, Yancheng 224002, Jiangsu, Peoples R China
Yan, Chao
Shu, Jinlong
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机构:
E China Normal Univ, Dept Math, Shanghai 200241, Peoples R ChinaYancheng Teachers Univ, Dept Math, Yancheng 224002, Jiangsu, Peoples R China