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Endomorphisms of semigroups of oriented transformations - MaRDI portal

Endomorphisms of semigroups of oriented transformations

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Publication:6406100

DOI10.1007/S00233-022-10325-YarXiv2207.12823MaRDI QIDQ6406100

De Biao Li, Vítor H. Fernandes

Publication date: 26 July 2022

Abstract: In this paper, we characterize the monoid of endomorphisms of the semigroup of all oriented full transformations of a finite chain, as well as the monoid of endomorphisms of the semigroup of all oriented partial transformations and the monoid of endomorphisms of the semigroup of all oriented partial permutations of a finite chain. Characterizations of the monoids of endomorphisms of the subsemigroups of all orientation-preserving transformations of the three semigroups aforementioned are also given. In addition, we compute the number of endomorphisms of each of these six semigroups.












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