(1) School of Mathematics and Information Science, Yantai University, Yantai City, 264005, P.R. China
Abstract:
We introduce the concept of generalized Cayley graphs of semigroups and discuss their fundamental properties, and then study a special case, the universal Cayley graphs of semigroups so that some general results are given and the universal Cayley graph of a -partial order of complete graphs with loops is described.