Browsing by Author "Dobson, Edward"
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- Automorphisms of endomorphism semigroups of reflexive digraphsPublication . Araújo, João; Dobson, Edward; Konieczny, JanuszA reflexive digraph is a pair (X,ρ), where X is an arbitrary set and ρ is a reflexive binary relation on X. Let End (X, ρ) be the semigroup of endomorphisms of (X, ρ). We determine the group of automorphisms of End(X,ρ) for: digraphs containing an edge not contained in a cycle, digraphs consisting of arbitrary unions of cycles such that cycles of length ≥ 2 are pairwise disjoint, and some circulant digraphs.