Results 131 to 140 of about 881 (228)

AN ALTERNATIVE MEASUREMENT STRUCTURE: THE POSITIVELY ORDERED PARTIAL SEMIGROUP WITH IDENTITY (HALFGROUPOID)

open access: yes, 1984
A set of axioms which define a positively ordered partial semigroup with identity, an alternative measurement system, is introduced. The positively ordered partial semigroup with identity is defined by a set A of objects, an order among those objects, an
HOLLAND, SUSAN GENSEMER
core  

Interior and closure operators on residuated ordered semigroup(剩余序半群的内部和闭包算子)

open access: yesZhejiang Daxue xuebao. Lixue ban
In this paper, the concept of inner and closure operators on residuated ordered semigroups is introduced, some of their related algebraic properties are studied.
李毅君(LI Yijun)   +1 more
doaj   +1 more source

Ordered Regular Semigroups with Biggest Associates

open access: yesDiscussiones Mathematicae - General Algebra and Applications, 2019
We investigate the class BA of ordered regular semigroups in which each element has a biggest associate x† = max {y | xyx = x}. This class properly contains the class PO of principally ordered regular semigroups (in which there exists x⋆ = max {y | xyx ...
Blyth T.S., Santos M.H. Almeida
doaj   +1 more source

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  

Hypergroup deformations of semigroups

open access: yes, 2019
We view the well-known example of the dual of a countable compact hypergroup, motivated by the orbit space of p-adic integers by Dunkl and Ramirez (Trans Am Math Soc 202:339-356, 1975), as hypergroup deformation of the max semigroup structure on the ...
Kumar, Vishvesh   +3 more
core   +1 more source

Completely positive maps of order zero [PDF]

open access: yes, 2009
We say a completely positive contractive map between two C<sup>*</sup>-algebras has order zero, if it sends orthogonal elements to orthogonal elements. We prove a structure theorem for such maps. As a consequence, order zero maps are in one-
Winter, W. (Wilhelm)   +3 more
core  

Filters in ordered $\Gamma$-semigroups

open access: yesRocky Mountain Journal of Mathematics, 2011
Let \(M\) be an ordered \(\Gamma\)-semigroup. The author considers some relations between the filter \(N(a)\) of \(M\) generated by an element \(a\) of \(M\) and the complete semilattice congruence \(\mathcal N\) on \(M\) defined by \(\{(a,b) \mid N(a)=N(b)\}\). He also gives some examples of ordered \(\Gamma\)-semigroups. For \(\Gamma=\{\gamma\}\) (\(\
openaire   +2 more sources

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