Results 41 to 50 of about 683 (105)
Quivers of monoids with basic algebras
, 2011 We compute the quiver of any monoid that has a basic algebra over an algebraically closed field of characteristic zero. More generally, we reduce the computation of the quiver over a splitting field of a class of monoids that we term rectangular monoids (
Aguiar +27 more
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Quasi-abelian and quasi-solvable regular semigroups
Le Matematiche, 1996 In this note quasi-abelian semigroups are studied and it is proved that they form an e-variety of orthodox semigroups. More, quasi-abelian regular Bruck-Reilly monoids are characterized as extensions of monoids which are (reverse) semidirect products of ...
Brunetto Piochi
doaj
The isomorphism problem for orthodox semigroups [PDF]
Pacific Journal of Mathematics, 1989 The author's structure theorem for orthodox semigroups [ibid. 39, 677-686 (1971; Zbl 0232.20124)] produced an orthodox semigroup \({\mathcal H}(E,T,\psi)\) from a band \(E\), an inverse semigroup \(T\) and a morphism \(\psi\) between two inverse semigroups, namely \(T\) and \(W_ E/\gamma\), an inverse semigroup constructed from \(E\).
openaire +3 more sources
Semigroups whose idempotents form a subsemigroup [PDF]
, 1992 We prove that every semigroup S in which the idempotents form a subsemigroup has an E-unitary cover with the same property. Furthermore, if S is E-dense or orthodox, then its cover can be chosen with the same property. Then we describe the structure of E-
Almeida, Jorge +2 more
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Some Classes Of Semigroups That Have Medial Idempotent And Some Construction Theorem [PDF]
, 2013 It's known that the set of idempotents of the semigroup, plays an important role forthe structure of this semigroup. Specially, in the regular semigroups, an importantrole plays presence of the medial idempotent and normal medial idempotent.Blyth,T.
Edmond Pİ, Osman HYSA
core
On the variety of strict pseudosemilattices
, 2013 A new model, in terms of finite bipartite graphs, of the free pseudosemilattice is presented. This will then be used to obtain several results about the variety SPS of all strict pseudosemilattices: (i) an identity basis for SPS is found, (ii) SPS is ...
Auinger, K., Oliveira, L.
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Ash's type II theorem, profinite topology and Malcev products [PDF]
, 1991 This paper is concerned with the many deep and far reaching consequences of Ash's positive solution of the type II conjecture for finite monoids. After rewieving the statement and history of the problem, we show how it can be used to decide if a finite ...
Henckell, Karsten +3 more
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Orthodox semigroups and permutation matchings [PDF]
Semigroup Forum, 2016 We determine when an orthodox semigroup S has a permutation that sends each member of S to one of its inverses and show that if such a permutation exists, it may be taken to be an involution. In the case of a finite orthodox semigroup the condition is an effective one involving Green's relations on the combinatorial images of the principal factors of S.
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Representation Theory of Finite Semigroups, Semigroup Radicals and Formal Language Theory
, 2007 In this paper we characterize the congruence associated to the direct sum of all irreducible representations of a finite semigroup over an arbitrary field, generalizing results of Rhodes for the field of complex numbers.
Almeida, Jorge +3 more
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Decoherence and noise in open quantum system dynamics
, 2016 We consider the description of quantum noise within the framework of the standard Copenhagen interpretation of quantum mechanics applied to a composite system environment setting.
Vacchini, Bassano
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