Results 101 to 110 of about 69,892 (204)

On (m, n)-ideals and (m, n)-regular ordered semigroups [PDF]

open access: yesSongklanakarin Journal of Science and Technology (SJST), 2016
Let m, n be non-negative integers. A subsemigroup A of an ordered semigroup (S,  ,  is called an (m, n)-ideal of S if (i) Am SAn  A, and (ii) if x  A, y  S such that y  x, then y  A. In this paper, necessary and sufficient conditions for every (
Limpapat Bussaban, Thawhat Changphas
doaj  

On representation of semigroups of inclusion hyperspaces

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2010
Given a group $X$ we study the algebraic structure of the compactright-topological semigroup $G(X)$ consisting of inclusionhyperspaces on $X$. This semigroup contains the semigroup$lambda(X)$ of maximal linked systems as a closed subsemigroup.We ...
Gavrylkiv V.M.
doaj  

Stratified semigroups

open access: yesSemigroup Forum, 1995
A semigroup \(S\) with zero 0 is called stratisfied if \(\bigcap_{m > 0} S^ m = \{0\}\). (The definition is effective for any semigroup, that is, a semigroup \(S\) is stratisfied if \(S^ 0\) is stratisfied.) The depth function \(\lambda : S \setminus \{0\} \to N\) assigns to each \(s \in S\), \(s\neq 0\), the greatest positive integer \(m\) such that \(
openaire   +2 more sources

Controllability of Fractional Integro-Differential Equations with Delays and Singular Kernels in Fréchet Spaces

open access: yesMathematics
This paper is devoted to the investigation of existence and approximate controllability results for a class of fractional integro-differential equations formulated in Fréchet spaces.
Fatima Mesri   +2 more
doaj   +1 more source

Smarandache Soft Semigroups and their Properties

open access: yesJournal of New Theory, 2015
– In this paper, the notions of smarandache soft semigroups (SS-semigroups) introduced for the first time. An SS-semigroup ( , ) is basically a parameterized collection of subsemigroups which has F A is basically a parameterized collection of ...
Mumtaz Ali
doaj  

ON SOME IDEALS OF INTUITIOISTIC FUZZY POINTS SEMIGROUPS

open access: yesJournal of New Theory, 2017
– In this paper, the minimal ideal characteristic function we consider the semigroup of the intuitionistic fuzzy points of a semigroup and discuss some relations between some ideals of and the subset of the ...
Essam Hamed Hamouda
doaj  

Baer *-semigroups [PDF]

open access: yesProceedings of the American Mathematical Society, 1960
openaire   +1 more source

Reflexive semigroups [PDF]

open access: yesProceedings of the American Mathematical Society, 1965
Fulp, R. O., Hill, P.
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Generalized Polynomials on Semigroups

open access: yesAnnales Mathematicae Silesianae
This article has two main parts. In the first part we show that some of the basic theory of generalized polynomials on commutative semi-groups can be extended to all semigroups.
Ebanks Bruce
doaj   +1 more source

Affine semigroups [PDF]

open access: yesTransactions of the American Mathematical Society, 1959
Cohen, Haskell, Collins, H. S.
openaire   +2 more sources

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