Results 21 to 30 of about 1,361 (185)

Existence of solutions for quasilinear random impulsive neutral differential evolution equation

open access: yesArab Journal of Mathematical Sciences, 2018
This paper deals with the existence of solutions for quasilinear random impulsive neutral functional differential evolution equation in Banach spaces and the results are derived by using the analytic semigroup theory, fractional powers of operators and ...
B. Radhakrishnan, M. Tamilarasi
doaj   +1 more source

Group theory via global semigroup theory

open access: yesJournal of Algebra, 1989
Groups are shown to be special homomorphic images of residually finite inverse semigroups. To this aim the authors define three types of expansions of semigroups. When the starting semigroup is a group the three types of expansions give isomorphic semigroups and (selecting a large enough generator set for the group) the expansion thus obtained is an ...
Birget, Jean-Camille, Rhodes, John
openaire   +1 more source

Soft Intersection Bi-interior Ideals of Semigroups

open access: yesJournal of Innovative Science and Engineering
Generalizing the ideals of an algebraic structure has shown to be both beneficial and interesting for mathematicians. In this context, the idea of the bi-interior ideal was introduced as a generalization of the bi-ideal and interior ideal of a semigroup.
Aslihan Sezgin, Aleyna İlgin
doaj   +1 more source

A Hesitant Fuzzy Set Approach to Ideal Theory in Γ-Semigroups

open access: yesAdvances in Fuzzy Systems, 2018
We apply the hesitant fuzzy sets theory to Γ-semigroups and provide some characterizations of hesitant fuzzy left (right and bi-) ideals. We introduce the hesitant fuzzy left (resp., right and two-sided) ideal, hesitant fuzzy bi-ideal, and hesitant fuzzy
Mohammad Y. Abbasi   +3 more
doaj   +1 more source

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

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

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

Geometric Semigroup Theory

open access: yes, 2011
Geometric semigroup theory is the systematic investigation of finitely-generated semigroups using the topology and geometry of their associated automata. In this article we show how a number of easily-defined expansions on finite semigroups and automata lead to simplifications of the graphs on which the corresponding finite semigroups act.
McCammond, Jon   +2 more
openaire   +2 more sources

Advanced control of non‐isothermal axial dispersion tubular reactors with recycle‐induced state delay

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Abstract We develop a delay‐aware estimation and control framework for a non‐isothermal axial dispersion tubular reactor modelled as a coupled parabolic‐hyperbolic PDE system with recycle‐induced state delay. The infinite‐dimensional dynamics are preserved without spatial discretization by representing the delay as a transport PDE and adopting a late ...
Behrad Moadeli, Stevan Dubljevic
wiley   +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  

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