Abstract Andrei Kelarev and Cheryl Preager gave necessary and sufficient conditions for
Cayley graphs of semigroups to be vertex-transitive and undirected respectively in [10],[11] …

Topologies for data center interconnection networks have been proposed in the literature
through various graph classes and operations. A common trait to most existing designs is …

There are six different classes of endomorphisms for a graph. The set of these
endomorphisms always form a chain under set inclusions. The endomorphism type of a …

Symmetry of graphs has been extensively studied over the past 50 years by using
automorphisms of graphs and group theory which have played an important role in graph …

Symmetry of graphs has been extensively studied over the past fifty years by using
automorphisms of graphs and group theory which have played and still play an important …

Weakly s-arc transitive graphs are introduced and determined. A graph is said to be weakly
s-arc transitive if its endomorphism monoid acts transitively on the set of s-arcs. The main …

弱1/2 -传递图 Page 1 仲恺农业技术学院学报, 17(3):58~ 61, 2004 Journal of Zhongkai
Agrotechnical College 文章编号:1006-0774(2004)03-0058-04 收稿日期:2004-01-12 作者简介 …