Results 31 to 40 of about 146,027 (294)

On the K-theory of the C*-algebra generated by the left regular representation of an Ore semigroup [PDF]

open access: yes, 2012
We compute the K-theory of C*-algebras generated by the left regular representation of left Ore semigroups satisfying certain regularity conditions. Our result describes the K-theory of these semigroup C*-algebras in terms of the K-theory for the reduced
J. Cuntz, S. Echterhoff, Xin Li
semanticscholar   +1 more source

The 3x+1 Semigroup [PDF]

open access: yes, 2004
The 3x+1 semigroup is the multiplicative semigroup generated by the rational numbers of form (2k+1)/(3k+2) for non-negative k, together with 2. This semigroup encodes backward iteration under the 3x+1 map, and the 3x+1 conjecture implies that it contains
C. Lagarias, David Applegate, Jeffrey
core   +3 more sources

On Minimal Fuzzy Ideals of Semigroups

open access: yesJournal of Mathematics, 2013
The present paper contains the sufficient condition of a fuzzy semigroup to be a fuzzy group using fuzzy points. The existence of a fuzzy kernel in semigroup is explored.
Madad Khan   +2 more
doaj   +1 more source

Transposition Regular TA-Groupoids and Their Structures

open access: yesAxioms, 2022
Tarski associative groupoid (TA-groupoid) is a kind of non-associative groupoid satisfying Tarski associative law. In this paper, the new notions of transposition regular TA-groupoid are proposed and their properties and structural characteristics are ...
Xiaogang An, Xiaohong Zhang
doaj   +1 more source

Cross-connections and variants of the full transformation semigroup [PDF]

open access: yes, 2017
Cross-connection theory propounded by K. S. S. Nambooripad describes the ideal structure of a regular semigroup using the categories of principal left (right) ideals.
Muhammed, P. A. Azeef
core   +1 more source

A metrizable semitopological semilattice with non-closed partial order

open access: yesTopological Algebra and its Applications, 2020
We construct a metrizable semitopological semilattice X whose partial order P = {(x, y) ∈ X × X : xy = x} is a non-closed dense subset of X × X. As a by-product we find necessary and sufficient conditions for the existence of a (metrizable) Hausdorff ...
Banakh Taras   +2 more
doaj   +1 more source

Time-Decay Estimates for Linearized Two-Phase Navier–Stokes Equations with Surface Tension and Gravity

open access: yesMathematics, 2021
The aim of this paper is to show time-decay estimates of solutions to linearized two-phase Navier-Stokes equations with surface tension and gravity. The original two-phase Navier-Stokes equations describe the two-phase incompressible viscous flow with a ...
Hirokazu Saito
doaj   +1 more source

Topological monoids of almost monotone injective co-finite partial selfmaps of the set of positive integers

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2013
In this paper we study the semigroup $\mathcal{I}_{\,\infty}^{?\nearrow}(\mathbb{N})$ of partial co-finite almost monotone bijective transformations of the set of positive integers $\mathbb{N}$.
I. Ya. Chuchman, O. V. Gutik
doaj   +1 more source

Review of the Latest Progress in Controllability of Stochastic Linear Systems and Stochastic GE-Evolution Operator

open access: yesMathematics, 2021
According to the spatial dimension, equation type, and time sequence, the latest progress in controllability of stochastic linear systems and some unsolved problems are introduced. Firstly, the exact controllability of stochastic linear systems in finite
Zhaoqiang Ge
doaj   +1 more source

Large Aperiodic Semigroups [PDF]

open access: yes, 2014
The syntactic complexity of a regular language is the size of its syntactic semigroup. This semigroup is isomorphic to the transition semigroup of the minimal deterministic finite automaton accepting the language, that is, to the semigroup generated by ...
A. Kisielewicz   +11 more
core   +3 more sources

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