Results 31 to 40 of about 60,099 (181)

Ideals and Green's relations in ordered semigroups

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2006
Exactly as in semigroups, Green's relations play an important role in the theory of ordered semigroups—especially for decompositions of such semigroups.
Niovi Kehayopulu
doaj   +1 more source

An (α,β)-Hesitant Fuzzy Set Approach to Ideal Theory in Semigroups

open access: yesBulletin of the Section of Logic, 2022
The aim of this manuscript is to introduce the \((\alpha,\beta)\)-hesitant fuzzy set and apply it to semigroups. In this paper, as a generalization of the concept of hesitant fuzzy sets to semigroup theory, the concept of \((\alpha,\beta)\)-hesitant ...
Pairote Yiarayong
doaj   +1 more source

Chomp on numerical semigroups [PDF]

open access: yes, 2018
We consider the two-player game chomp on posets associated to numerical semigroups and show that the analysis of strategies for chomp is strongly related to classical properties of semigroups.
García-Marco, Ignacio, Knauer, Kolja
core   +3 more sources

On generalized Ehresmann semigroups

open access: yesOpen Mathematics, 2017
As a generalization of the class of inverse semigroups, the class of Ehresmann semigroups is introduced by Lawson and investigated by many authors extensively in the literature.
Wang Shoufeng
doaj   +1 more source

DIVISIBILITY TESTS FOR SMARANDACHE SEMIGROUPS [PDF]

open access: yes, 2002
Two Divisibility Tests for Smarandache semigroups are given. Further, the notion of divisibility of elements in a semigroup is applied to characterize the Smarandache semigroups.
Rao, Chandra Sekhar
core   +1 more source

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

Picture N-Sets and Applications in Semigroups

open access: yesInternational Journal of Analysis and Applications, 2022
In this paper, we study picture N-structures and apply it to semigroups. Moreover, we define picture N-ideals in semigroups and investigate several properties of these ideals in semigroups.
Anusorn Simuen   +3 more
doaj   +1 more source

On a certain class of semigroups of operators [PDF]

open access: yes, 2010
We define an interesting class of semigroups of operators in Banach spaces, namely, the randomly generated semigroups. This class contains as a remarkable subclass a special type of quantum dynamical semigroups introduced by Kossakowski in the early ...
Breuer H. P.   +7 more
core   +1 more source

Asymptotic expansions for Yosida approximations of semigroups

open access: yesLietuvos Matematikos Rinkinys, 2008
In this paper we provide asymptotic expansions for Yosida approximations of contraction semigroups. We also obtain optimal bounds for convergencerate and remainder terms of asymptotic expansions.
Monika Vilkienė
doaj   +1 more source

Rough semigroups and rough fuzzy semigroups based on fuzzy ideals

open access: yesOpen Mathematics, 2016
In this paper, we firstly introduce a special congruence relation U(μ, t) induced by a fuzzy ideal μ in a semigroup S. Then we define the lower and upper approximations based on a fuzzy ideal in semigroups. We can establish rough semigroups, rough ideals,
Wang Qiumei, Zhan Jianming
doaj   +1 more source

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