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Graphs with Strong Endomorphism Monoid being the Union of Groups
强自同态半群构成并群的图族

Keywords: Graph,Endomorphism,Semigroup,Group
,自同态,半群,

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Abstract:

In this paper,the author gives a characterization for a graph G such that sEnd(G), the monoid of the strong endomorphisms of G,is the union of groups.In particular,if this is the case,the author explicitly finds the identity element of each group in sEnd(G).

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