Results 51 to 60 of about 5,622,676 (84)
Characterizing Topologically Dense Injective Acts and Their Monoid Connections
Journal of Mathematics, Volume 2024, Issue 1, 2024.In this paper, we explore the concept of topologically dense injectivity of monoid acts. It is shown that topologically dense injective acts constitute a class strictly larger than the class of ordinary injective ones. We determine a number of acts satisfying topologically dense injectivity.
Masoomeh Hezarjaribi Dastaki +3 more
wiley +1 more source
On ∼n Notion of Conjugacy in Some Classes of Epigroups
Journal of Mathematics, Volume 2024, Issue 1, 2024.The action of any group on itself by conjugation and the corresponding conjugacy relation plays an important role in group theory. Generalizing the group theoretic notion of conjugacy to semigroups is one of the interesting problems, and semigroup theorists had produced substantial amount of research in this direction.
Aftab Hussain Shah +3 more
wiley +1 more source
Unary FA-presentable semigroups [PDF]
, 2012 Automatic presentations, also called FA-presentations, were introduced to extend nite model theory to innite structures whilst retaining the solubility of interesting decision problems.
Cain, Alan James +2 more
core +1 more source
On adequate transversals [PDF]
, 2009 We consider adequate transversals of abundant semigroups and prove that, in a particular case, there is a natural embedding of an inverse transversal within a certain regular subsemigroup.
Renshaw, James, Al-Bar, Jehan
core +1 more source
Green index in semigroups : generators, presentations and automatic structures [PDF]
, 2012 The Green index of a subsemigroup T of a semigroup S is given by counting strong orbits in the complement S n T under the natural actions of T on S via right and left multiplication.
Ruskuc, Nik +4 more
core +1 more source
The Bergman property for semigroups [PDF]
, 2009 In this article, we study the Bergman property for semigroups and the associated notions of cofinality and strong cofinality. A large part of the paper is devoted to determining when the Bergman property, and the values of the cofinality and strong ...
Ruskuc, N. +7 more
core +1 more source
Direct products of free groups and free idempotent generated semigroups over bands
, 2011 For each group G which decomposes into a finitary direct product of free groups of finite rank we construct a regular band B such that the free idempotent generated semigroup over B contains a maximal subgroup isomorphic to G. In particular, there exists a (regular) band B_0 with the property that any idempotent generated semigroup whose biordered set ...
openaire +2 more sources
On idempotent n-ary semigroups [PDF]
, 2020 This thesis, which consists of two parts, focuses on characterizations and descriptions of classes of idempotent n-ary semigroups where n >= 2 is an integer.
DEVILLET, Jimmy
core +1 more source
On supermatrix idempotent operator semigroups [PDF]
, 2003 One-parameter semigroups of antitriangle idempotent supermatrices and corresponding superoperator semigroups are introduced and investigated. It is shown that t-linear idempotent superoperators and exponential superoperators are mutually dual in some ...
Duplij, Steven
core +1 more source
Subsemigroups of virtually free groups : finite Malcev presentations and testing for freeness [PDF]
, 2006 This paper shows that, given a finite subset X of a finitely generated virtually free group F, the freeness of the subsemigroup of F generated by X can be tested algorithmically. (A group is virtually free if it contains a free subgroup of finite index.)
Robertson, Edmund Frederick +2 more
core +1 more source