Results 51 to 60 of about 254,909 (213)

The Relationship between Two Involutive Semigroups S and ST Is Defined by a Left Multiplier T

open access: yesJournal of Function Spaces, 2014
Let S be a semigroup with a left multiplier T on S. There exists a new semigroup ST, which depends on S and T, which has the same underlying space as S. We study the question of involutions on ST and a Banach algebra AT.
S. M. Mohammadi, J. Laali
doaj   +1 more source

Cubic Bipolar Fuzzy Ideals with Thresholds (α, β), ( ω ,ϑ) of a Semigroup in KU-algebra

open access: yesIbn Al-Haitham Journal for Pure and Applied Sciences, 2022
In this paper, we introduce the concept of cubic bipolar-fuzzy ideals with thresholds (α,β),(ω,ϑ) of a semigroup in KU-algebra as a generalization of sets and in short (CBF). Firstly, a (CBF) sub-KU-semigroup with a threshold (α,β),(ω,ϑ) and some results
Omniat Adnan Hasan   +1 more
doaj   +1 more source

Extensions of semigroups and morphisms of semigroup $C^*$-algebras

open access: yesSibirskii matematicheskii zhurnal, 2021
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

Maximal subgroups of free idempotent-generated semigroups over the full transformation monoid [PDF]

open access: yes, 2011
Let Tn be the full transformation semigroup of all mappings from the set {1, . . . , n} to itself under composition. Let E = E(Tn) denote the set of idempotents of Tn and let e ∈ E be an arbitrary idempotent satisfying |im (e)| = r ≤ n − 2. We prove that
Ruskuc, N.   +4 more
core   +1 more source

The Cuntz Comparison in the Standard C*-Algebra

open access: yesAbstract and Applied Analysis, 2014
The Cuntz comparison, introduced by Cuntz in early 1978, associates each C*-algebra with an abelian semigroup which is an invariant for the classification of the nuclear C*-algebras and called the Cuntz semigroup.
Xiaochun Fang   +2 more
doaj   +1 more source

Cuntz Semigroups of Compact-Type Hopf C*-Algebras

open access: yesAxioms, 2017
The classical Cuntz semigroup has an important role in the study of C*-algebras, being one of the main invariants used to classify recalcitrant C*-algebras up to isomorphism.
Dan Kučerovský
doaj   +1 more source

Centrally essential semigroup algebras

open access: yesИтоги науки и техники Серия «Современная математика и ее приложения Тематические обзоры», 2022
For a cancellative semigroup S and a field F, it is proved that the semigroup algebra FS is centrally essential if and only if the group of fractions $G_S$ of the semigroup $S$ exists and the group algebra $FG_S$ of $G_S$ is centrally essential. The semigroup algebra of a cancellative semigroup is centrally essential if and only if it has the classical
Oleg Vladimirovich Ljubimtsev   +1 more
openaire   +2 more sources

Quasiminimal distal function space and its semigroup compactification

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1995
Quasiminimal distal function on a semitopological semigroup is introduced. The concept of right topological semigroup compactification is employed to study the algebra of quasiminimal distal functions.
R. D. Pandian
doaj   +1 more source

$sigma$-Connes Amenability and Pseudo-(Connes) Amenability of Beurling Algebras [PDF]

open access: yesSahand Communications in Mathematical Analysis, 2019
In this paper,  pseudo-amenability and pseudo-Connes amenability of weighted semigroup algebra $ell^1(S,omega)$ are studied. It is proved that pseudo-Connes amenability and pseudo-amenability of weighted group algebra $ell^1(G,omega)$ are the same ...
Zahra Hasanzadeh, Amin Mahmoodi
doaj   +1 more source

Heat semigroups on Weyl algebra [PDF]

open access: yesJournal of Geometry and Physics, 2021
42 pages; version accepted in J.
openaire   +3 more sources

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