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math.RA2012
On a class of semigroup graphs
Li Chen, Tongsuo Wu
Let be a semigroup graph, i.e., a zero-divisor graph of a semigroup with zero element 0. For any adjacent vertices in , denote $C(x,y)={z\in V(G) | N(z)={x,y…
math.RA2005★ 8 cited
Simple Graphs and Commutative Zero-Divisor Semigroups
Tongsuo Wu, Li Chen
In this paper, we study commutative zero-divisor semigroups determined by graphs. We prove a uniqueness theorem for a class of graphs. We show two classes of graphs that have no co…