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河池学院数学系
纸质出版:2013
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罗美金. 双圈双色有向图的本原指数上界[J]. 中北大学学报(自然科学版), 2013,34(4):358-362.
罗美金. Upper Bound on Primitive Exponents of Two-Colored Digraphs with Two Cycles[J]. 2013, 34(4): 358-362.
一个双色有向图D是本原的
如果存在非负整数h和k
且h+k0
使得D中的每一对顶点(i
j)都存在从i到j的(h
k)-途径
则称h+k的最小值为D的本原指数.利用圈矩阵和图论的有关知识
考虑双圈双色有向图
它的未着色图中含有(n+m-q)个顶点
包含一个n-圈和一个m-圈
给出了本原条件和指数上界
并对极图进行了刻划.
A two-colored digraph D was primitive
if there existed nonnegative integers h and k with h+k0
each pair(i
j) of vertices had a(h
k)-path in D from i to j.The exponent of the primitive two-colored digraph D was defined to be the smallest value of h+k using relevant knowledge of the cycle matrix and graph theory
we considered two-colored digraphs with two cycles whose uncolored digraph had(n+m-q) vertices and consisted of one n-cycle and one m-cycle.Some primitive conditions and a upper bound on the exponents were given.The characterizations of extremal two-colored digraphs were also given.
Shader B L,Suwilo S.Exponents of nonnegative ma-trix pairs[J].Linear Algebra Appl.,2003,363:275-293.
高玉斌,邵燕灵.双色双向图的本原指数[J].黑龙江大学自然科学版学报,2004,21(4):55-58.Gao Yubin,Shao Yanling.Exponent of two-coloreddouble directed cycles[J].Journal of Natural Scienceof Heilongjiang University,2004,21(4):55-58.(inChinese)
Gao Yubin,Shao Yanling,Sun Liang.Exponent of aclass of two-colored digraphs[J].Linear and Multilin-ear Algrbra,2005,53(3):175-188.
Gao Yubin,Shao Yanling.Exponent of two-coloreddigraphs with two cycles[J].Linear Algebra Appl.,2005,407:263-276.
罗美金,高玉斌.一类含有两个圈的双色有向图本原指数[J].中北大学学报(自然科学版),2007,28(5):377-382.Luo Meijin,Gao Yubin.Exponents of a class of two-colored digraphs with two cycles[J].Journal of NorthUniversity of China(Natural Science Edition),2007,28(5):377-382.(in Chinese)
罗美金,高玉斌.一类双色有向图的本原指数[J].中北大学学报(自然科学版),2008,29(2):95-100.Luo Meijin,Gao Yubin.Exponents of a class of two-colored digraphs[J].Journal of North University ofChina(Natural Science Edition),2008,29(2):95-100.(in Chinese)
罗美金,高玉斌.一类恰含三个圈的三色有向图的本原指数[J].山东大学学报(理学版),2008,43(1):65-72.Luo Meijin,Gao Yubin.Exponents of a class of three-colored digraphs with three cycles[J].Journal ofShandong University(Natural Science Edition),2008,43(1):65-72.(in Chinese)
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