Endomorphisms of Cayley digraphs of rectangular groups
Abstract
Let Cay(S,A) denote the Cayley digraph of the semigroup S with respect to the set A, where A is any subset of S. The function f:Cay(S,A)→Cay(S,A) is called an endomorphism of Cay(S,A) if for each (x,y)∈E(Cay(S,A)) implies (f(x),f(y))∈E(Cay(S,A)) as well, where E(Cay(S,A)) is an arc set of Cay(S,A). We characterize the endomorphisms of Cayley digraphs of rectangular groups G×L×R, where the connection sets are in the form of A=K×P×T.
Keywords
Cayley digraphs, rectangular groups, endomorphisms
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