Results 101 to 110 of about 14,642 (224)

Decompositions of ordered semigroups into a chain of k-Archimedean ordered semigroups

open access: yesFilomat, 2016
In this paper, we first define various types of k-regularity of ordered semigroups and various types of k-Archimedness of ordered semigroups. Also, we define the relations ?(k), ?(k)l, ?(k)r, ?(k)t and ?(k)b (k ? Z+) on an ordered semigroup.
QingShun Zhu, Zarko Popovic
openaire   +2 more sources

On Epiorthodox Semigroups

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2011
It has been well known that the band of idempotents of a naturally ordered orthodox semigroup satisfying the “strong Dubreil-Jacotin condition” forms a normal band.
Shouxu Du, Xinzhai Xu, K. P. Shum
doaj   +1 more source

Weakly Semiprime Segments in Ordered Semigroups

open access: yesMathematics, 2019
Let P 2 ⊂ P 1 be a pair of weakly semiprime ideals of an ordered semigroup ( S , · , ≤ ) . Then, the pair P 2 ⊂ P 1 is called a weakly semiprime segment of S if ⋂ n ∈ N I n ⊆ P 2
Panuwat Luangchaisri, Thawhat Changphas
doaj   +1 more source

On certain lattice—Ordered semigroups

open access: yesSemigroup Forum, 1985
The aim of this paper is the introduction and the initial study of a lattice-ordered semigroup S which satisfies \(ab=(a\vee b)(a\wedge b)\) for all a,b\(\in S\). This axiom is of course a well-known theorem of the classical theory of divisibility over commutative and cancellative semigroups.
Ciobanu, G., Deaconescu, M.
openaire   +2 more sources

Positive Solutions for the Initial Value Problems of Fractional Evolution Equation

open access: yesJournal of Function Spaces and Applications, 2013
This paper discusses the existence of positive solutions for the initial value problem of fractional evolution equation with noncompact semigroup , ; in a Banach space , where denotes the Caputo fractional derivative of order , is a closed linear ...
Yue Liang, Yu Ma, Xiaoyan Gao
doaj   +1 more source

Semigroups, rings, and Markov chains

open access: yes, 1999
We analyze random walks on a class of semigroups called ``left-regular bands''. These walks include the hyperplane chamber walks of Bidigare, Hanlon, and Rockmore.
Brown, Kenneth S.
core   +2 more sources

On numerical semigroups and the order bound

open access: yesJournal of Pure and Applied Algebra, 2008
AbstractLet S={s0 ...
ONETO, ANNA, TAMONE, GRAZIA
openaire   +3 more sources

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