Results 31 to 40 of about 87 (62)

Restrictions on local embeddability into finite semigroups

, 2023
In this paper the concept of local embeddability into finite structures (being LEF) for the class of semigroups is expanded with investigations of non-LEF structures, a closely related generalising property of local wrapping of finite structures (being ...
Kudryavtsev, Dmitry
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On free products of bicyclic monoids

Collectanea Mathematica, 1995
The author considers free products of a collection of bicyclic monoids both in the categories of monoids and inverse monoids. He looks into the structure of such free products and determines their Green's relations.
openaire   +2 more sources

Covers of acts over monoids

, 2013
Since they were first defined in the 1950's, projective covers (the dual of injective envelopes) have proved to be an important tool in module theory, and indeed in many other areas of abstract algebra.
Bailey, Alexander
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Algebraic Characterization of Petri Nets

, 1979
Let Cn be the direct product of the bicyclic monoid C, taken n times, where n is a positive integer. It is shown that (1) every Petry net with n places can be represented by a finite subset of Cn represents a Petri net with n places, and (3) the firing ...
Kimura, Takayuki D.
core   +1 more source

Cayley automaton semigroups

, 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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On the semigroup of injective endomorphisms of the semigroup $\boldsymbol{B}_{\omega}^{\mathscr{F}_n}$ which is generated by the family $\mathscr{F}_n$ of initial finite intervals of $\omega$

, 2022
In the paper we describe injective endomorphisms of the inverse semigroup $\boldsymbol{B}_{\omega}^{\mathscr{F}}$, which is introduced in the paper [O. Gutik and M. Mykhalenych, \emph{On some generalization of the bicyclic monoid}, Visnyk Lviv. Univ. Ser.
Popadiuk, Olha, Gutik, Oleg
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On the semigroup of non-injective monoid endomorphisms of some extension of the bicyclic monoid

Pozdniakova I. On the semigroup of non-injective monoid endomorphisms of some extension of the bicyclic monoid / I. Pozdniakova, O. Gutik // Algebraic and geometric methods of analysis - 2024 : abstr. of the Intern. sci. conf., Odesa, 27-30 May - 2024 / [
Gutik, O., Pozdniakova, I.
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Inverse semigroups generated by group congruences. The Möbius functions

, 2013
The computation of the Möbius function of a Möbius category that arises from a combinatorial inverse semigroup has a distinctive feature. This computation is done on the field of finite posets.
Schwab, E.D.
core   +1 more source

O monoide bicíclico: subsemigrupos e generalizações [PDF]

, 2008
Mestrado em Matemática - EnsinoEsta dissertação consiste num trabalho de recolha bibliográfica e síntese sobre o monoide bicíclico, B, propriedades, subsemigrupos, e generalizações. Iniciase o trabalho com uma breve introdução à teoria de semigrupos em
Ramos, Sandra Isabel Diogo
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FREE OBJECTS IN TRIANGULAR MATRIX VARIETIES AND QUIVER ALGEBRAS OVER SEMIRINGS

We study the free objects in the variety of semigroups and variety of monoids generated by the monoid of all n×n upper triangular matrices over a commutative semiring. We obtain explicit representations of these, as multiplicative subsemigroups of quiver
Kambites, Mark
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