Results 41 to 50 of about 5,376,972 (220)

A PROOF OF THE GEARHART’S THEOREM

open access: yesPesquimat, 2016
Using the notion of semigroup type, periodic solution of a nonhomogeneous equation, the fundamental principles of functional analysis, and strongly the notions of spectral theory, we give a proof of the famous and important result of Gearhart, about ...
Yolanda Silvia Santiago Ayala
doaj   +1 more source

Hyper-dependence, hyper-ageing properties and analogies between them: a semigroup-based approach [PDF]

open access: yes, 2001
In previous papers, evolution of dependence and ageing, for vectors of non-negative random variables, have been separately considered. Some analogies between the two evolutions emerge however in those studies.
SPIZZICHINO, Fabio   +4 more
core   +1 more source

NEUTROSOPHIC RINGS [PDF]

open access: yes, 2006
In this book we define the new notion of neutrosophic rings. The motivation for this study is two-fold. Firstly, the classes of neutrosophic rings defined in this book are generalization of the two well-known classes of rings: group rings and semigroup ...
Vasantha, Kandasamy   +2 more
core   +1 more source

Finite groups are big as semigroups [PDF]

open access: yes, 2011
We prove that a finite group G occurs as a maximal proper subsemigroup of an infinite semigroup (in the terminology of Freese, Ježek, and Nation, G is a big semigroup) if and only if |G| ≥ 3.
Ruskuc, Nik   +3 more
core   +1 more source

Neutrosophic Bi-LA-Semigroup and Neutrosophic N-LASemigroup [PDF]

open access: yesNeutrosophic Sets and Systems, 2014
In this paper we define neutrosophic bi-LA semigroup and neutrosophic N-LA-semigroup. Infact this paper is an extension of our previous paper neutrosophic left almost semigroup shortly neutrosophic LAsemigroup.
Mumtaz Ali   +3 more
doaj  

Skew compact semigroups

open access: yesApplied General Topology, 2003
Skew compact spaces are the best behaving generalization of compact Hausdorff spaces to non-Hausdorff spaces. They are those (X ; τ ) such that there is another topology τ* on X for which τ V τ* is compact and (X; τ ; τ*) is pairwise Hausdorff; under ...
Ralph D. Kopperman, Desmond Robbie
doaj   +1 more source

Existence and Approximate Controllability of Mild Solutions for Fractional Evolution Systems of Sobolev-Type

open access: yesFractal and Fractional, 2022
This paper investigates the existence and approximate controllability of Riemann–Liouville fractional evolution systems of Sobolev-type in abstract spaces.
Yue Liang
doaj   +1 more source

The Cuntz semigroup and domain theory [PDF]

open access: yesSoft Computing, 2017
Domain theory has its origins in Mathematics and Theoretical Computer Science. Mathematically it combines order and topology. Its central concepts have their origin in the idea of approximating ideal objects by their relatively finite or, more generally, relatively compact parts.
openaire   +2 more sources

A Semigroup Approach to the Justification of Kinetic Theory [PDF]

open access: yesSIAM Journal on Mathematical Analysis, 2012
This paper develops a method to rigorously show the validity of continuum description for the deterministic dynamics of many interacting particles with random initial data. We consider a hard sphere flow where particles are removed after the first collision.
Karsten Matthies, Florian Theil
openaire   +1 more source

Stability of Viscous Three‐Dimensional Stratified Couette Flow via Dispersion and Mixing

open access: yesCommunications on Pure and Applied Mathematics, EarlyView.
ABSTRACT This article explores the stability of stratified Couette flow in the viscous 3d$3d$ Boussinesq equations. In this system, mixing effects arise from the shearing background, and gravity acts as a restoring force leading to dispersive internal gravity waves.
Michele Coti Zelati   +2 more
wiley   +1 more source

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