Results 61 to 70 of about 468 (134)
, 2015 Let S be a semigroup, C(S) the automaton constructed from the right Cayley graph of S with respect to all of S as the generating set and ∑(C(S)) the automaton semigroup constructed from C(S). Such semigroups are termed Cayley automaton semigroups. For
McLeman, Alexander Lewis Andrew
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Clifford congruences on generalized quasi-orthodox GV-semigroups
, 2013 A semigroup S is said to be completely π-regular if for any a ∈ S there exists a positive integer n such that aⁿ is completely regular. A completely π-regular semigroup S is said to be a GV-semigroup if all the regular elements of S are completely ...
Maity, Sunil
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Classification and enumeration of finite semigroups
, 2010 The classification of finite semigroups is difficult even for small orders because of their large number. Most finite semigroups are nilpotent of nilpotency rank 3.
Distler, Andreas
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On right inverse ordered semigroups
, 2023 A regular ordered semigroup $S$ is called right inverse if every principal left ideal of $S$ is generated by an \( \mathcal{R} \)-unique positive element of it. We prove that a regular ordered semigroup is right inverse if and only if any two inverses of
Amlan Jamadar +3 more
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, 2004 It is well known that a semigroup S is a Clifford semigroup if and only if S is a strong semilattice of groups. We have recently extended this important result from semigroups to semirings by showing that a semiring S is a Clifford semiring if and only ...
Sen, Mridul +2 more
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Maximal Clifford Semigroups of Matrices
, 2006 All maximal Clifford semigroups of matrices are identified up to isomorphism. If the ground field of the matrices is finite, then there exists a unique Clifford semigroup of maximum ...
Lee, Edmond W. H.
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On cardinal invariants and metrizability of topological inverse Clifford semigroups
, 2003 Let S be a compact topological inverse Clifford semigroup S such that the maximal semilattice E and all maximal groups of S are metrizable. We prove that S is first countable and has countable cellularity; moreover, S is metrizable, provided one of the ...
Banakh, Taras
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On special Rees matrix semigroups over semigroups
, 2023 summary:We study the right regular representation of special Rees matrix semigroups over semigroups, and discuss their embedding in idempotent-free left simple ...
Tóth, Csaba, Nagy, Attila
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Boolean Congruence Lattices of Orthodox Semigroups
, 1991 The problem of characterizing the semigroups with Boolean congruence lattices has been solved for several classes of semigroups. Hamilton [9] and the author of this paper [1] studied the question for semilattices.
Karl Auinger
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, 2012 In this thesis we consider in detail the following two fundamental problems for semigroup presentations: 1. Given a semigroup find a presentation defining it. 2. Given a presentation describe the semigroup defined by it.
Ruškuc, Nik
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