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Unretractivity and End-Regularity of a Graph
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作者 李为民 《Journal of Mathematical Research and Exposition》 CSCD 北大核心 2002年第2期189-193,共5页
In this paper, a relationship among unretractivity, E-H-unretractivity andend-regularity of a graph is described.
关键词 endomorphism monoid REGULARITY unretractivity.
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E-H-Unretractivity of Bipartite Graphs
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作者 LI Wei Min 《Journal of Mathematical Research and Exposition》 CSCD 2009年第2期257-265,共9页
By End(G) and hEnd(G) we denote the set of endomorphisms and half-strong endomorphisms of a graph G respectively. A graph G is said to be E-H-unretractive if End(G) = hEnd(G). A general characterization of an ... By End(G) and hEnd(G) we denote the set of endomorphisms and half-strong endomorphisms of a graph G respectively. A graph G is said to be E-H-unretractive if End(G) = hEnd(G). A general characterization of an E-H-unretractive graph seems to be difficult. In this paper, bipartite graphs with E-H-unretractivity are characterized explicitly. 展开更多
关键词 endomorphism monoid E-H-unretractivity bipartite graph.
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