Results 21 to 30 of about 144,318 (259)

On Maximal Subgroups of Free Idempotent Generated Semigroups [PDF]

open access: yes, 2011
We prove the following results: (1) Every group is a maximal subgroup of some free idempotent generated semigroup. (2) Every finitely presented group is a maximal subgroup of some free idempotent generated semigroup arising from a finite semigroup.
Gray, Robert, Ruskuc, Nik
core   +2 more sources

FUZZY SEMIGROUPS IN REDUCTIVE SEMIGROUPS [PDF]

open access: yesKorean Journal of Mathematics, 2013
Summary: We consider a fuzzy semigroup \(S\) in a right (or left) reductive semigroup \(X\) such that \(S(k)=1\) for some \(k \in X\) and find a faithful representation (or anti-representation) of \(S\) by transformations of \(S\). Also we show that a fuzzy semigroup \(S\) in a weakly reductive semigroup \(X\) such that \(S(k)=1\) for some \(k \in X ...
openaire   +1 more source

Categorical semigroups [PDF]

open access: yesProceedings of the American Mathematical Society, 1972
The main purpose of this paper is to describe some properties of categorical semigroups, commutative semigroups which are categorical at zero, and determine the structure of commutative categorical semigroups. We also investigate whether Petrich’s tree condition, for categorical semigroups which are completely semisimple inverse semigroups, is ...
McMorris, F. R., Satyanarayana, M.
openaire   +2 more sources

Nilpotent Semigroups and Semigroup Algebras

open access: yesJournal of Algebra, 1994
First, the structure of nilpotent semigroups is discussed. If \(S\) is a completely 0-simple semigroup over a maximal group \(G\), then \(S\) is nilpotent if and only if \(G\) is nilpotent and \(S\) is an inverse semigroup. The main results on semigroup algebras are very interesting, but technical; they examine the prime homomorphic images of semigroup
Jespers, E., Okninski, J.
openaire   +1 more source

Introducing Fully Up-Semigroups

open access: yesDiscussiones Mathematicae - General Algebra and Applications, 2018
In this paper, we introduce some new classes of algebras related to UP-algebras and semigroups, called a left UP-semigroup, a right UP-semigroup, a fully UP-semigroup, a left-left UP-semigroup, a right-left UP-semigroup, a left-right UP-semigroup, a ...
Iampan Aiyared
doaj   +1 more source

Dimensional contraction via Markov transportation distance [PDF]

open access: yes, 2013
It is now well known that curvature conditions \`a la Bakry-Emery are equivalent to contraction properties of the heat semigroup with respect to the classical quadratic Wasserstein distance.
Bolley, François   +2 more
core   +5 more sources

Cross-connections and variants of the full transformation semigroup [PDF]

open access: yes, 2017
Cross-connection theory propounded by K. S. S. Nambooripad describes the ideal structure of a regular semigroup using the categories of principal left (right) ideals.
Muhammed, P. A. Azeef
core   +1 more source

Linear growth for semigroups which are disjoint unions of finitely many copies of the free monogenic semigroup [PDF]

open access: yes, 2015
We show that every semigroup which is a finite disjoint union of copies of the free monogenic semigroup (natural numbers under addition) has linear growth.
Abughazalah, Nabilah, Etingof, Pavel
core   +2 more sources

Coverable Semigroups [PDF]

open access: yesProceedings of the American Mathematical Society, 1973
The concept of a semilattice having small semilattices has been studied and some equivalences of this property have been investigated. In the process of investigating semilattices, the author found a class of semigroups called coverable semigroups, and the interesting fact about it is that a necessary and sufficient condition for a compact semilattice ...
openaire   +2 more sources

Remarks on the paper "M. Kolibiar, On a construction of semigroups" [PDF]

open access: yes, 2015
In his paper "On a construction of semigroups", M. Kolibiar gives a construction for a semigroup $T$ (beginning from a semigroup $S$) which is said to be derived from the semigroup $S$ by a $\theta$-construction.
Nagy, Attila
core   +2 more sources

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