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1. 河池学院数学系
2. 中北大学理学院
3. 中南大学数学与统计学院
纸质出版:2012
移动端阅览
罗美金, 高玉斌, 孙权宸. 一类含有三个圈的双色有向图本原指数上界[J]. 中北大学学报(自然科学版), 2012,33(6):627-631.
罗美金, 高玉斌, 孙权宸. Upper Bounds of Exponent of a Class of Two-Colored Digraphs with Three Cycles[J]. 2012, 33(6): 627-631.
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.考虑了一类含有三个圈的双色有向图
它的未着色图有n个顶点
包含一个n-圈和两个(n-2)-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 digraphs D is primitive if there exist nonnegative integers h and k with h+k0 such that for each pair (i
j) of vertices there exists an(h
k)-walk in D from i to j.The exponent of the primitive two-colored digraph D is the minimum value of h+k taken over all such h and k.It was considered that the special two-colored digraphs with three cycles whose uncolored digraph has n and consists of one n-cycle and two(n-2)-cycles.Some primitive conditions and a upper bound on the exponents was given.And the characterizations of two-colored extremal digraphs were given.
Shader B L.Exponents of nonnegative matrix pairs[J].Linear Algebra Appl.,2003,363:275-293.
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,2008,29(2):95.Luo Meijin,Gao Yubin.Primitive exponents of aclass of two-colored digraphs[J].Journal of NorthUniversity of China,2008,29(2):95.(in Chinese)
Gao Yubin,Shao Yanling.Exponent of two-coloreddouble directed cycles[J].Journal of Natural Scienceof Heilongjiang University,2004,4:55-58.
Gao Yubin.Exponent of two-colored digraphs withtwo cycles[J].Linear Algebra Appl.,2005,407:263.
Shao Yanling,Gao Yubin,Sun Liang.Exponent of aclass of two-colored digraphs[J].Linear andMultilinear Algrbra,2005,53(3):175-188.
罗美金.一类含有两个圈的双色有向图本原指数[J].中北大学学报,2007,28(5):377.Luo Meijin.Primitive exponents of a class of two-colored digraphs with two cycles[J].J.of NorthUniv.of China,2007,28(5):377.(in Chinese)
罗美金.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,2008,43(1):65.Luo Meijin.Primitive exponents of a class of three-colored digraphs with three cycles[J].J.of ShandongUniversity,2008,43(1):65.(in Chinese)
Bai Zhuxiang.Exponents of a class of two-coloreddigraphs[J].Journal of Shanxi University(NaturalScience Edition),2007,30(1):19-23.
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