Results 31 to 40 of about 84,954 (299)

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

On the K-theory of crossed products by automorphic semigroup actions [PDF]

open access: yes, 2012
Let P be a semigroup that admits an embedding into a group G. Assume that the embedding satisfies a certain Toeplitz condition and that the Baum-Connes conjecture holds for G.
J. Cuntz, S. Echterhoff, Xin Li
semanticscholar   +1 more source

Frequently Hypercyclic and Chaotic Behavior of Some First-Order Partial Differential Equation

open access: yesAbstract and Applied Analysis, 2013
We study a particular first-order partial differential equation which arisen from a biologic model. We found that the solution semigroup of this partial differential equation is a frequently hypercyclic semigroup.
Cheng-Hung Hung, Yu-Hsien Chang
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

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

On transformation semigroups which are ℬ𝒬-semigroups

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2006
A semigroup whose bi-ideals and quasi-ideals coincide is called a ℬ𝒬-semigroup. The full transformation semigroup on a set X and the semigroup of all linear transformations of a vector space V over a field F into itself are denoted, respectively, by T(X)
S. Nenthein, Y. Kemprasit
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

ON THE CAYLEY SEMIGROUP OF A FINITE APERIODIC SEMIGROUP [PDF]

open access: yesInternational Journal of Algebra and Computation, 2009
Let S be a finite semigroup. In this paper, we introduce the functions φs:S* → S*, first defined by Rhodes, given by φs([a1,a2,…,an]) = [sa1,sa1a2,…,sa1a2 ⋯ an]. We show that if S is a finite aperiodic semigroup, then the semigroup generated by the functions {φs}s ∈ S is finite and aperiodic.
openaire   +2 more sources

Reductive compactifications of semitopological semigroups

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2003
We consider the enveloping semigroup of a flow generated by the action of a semitopological semigroup on any of its semigroup compactifications and explore the possibility of its being one of the known semigroup compactifications again.
Abdolmajid Fattahi   +2 more
doaj   +1 more source

Home - About - Disclaimer - Privacy