Results 11 to 20 of about 579 (94)

Uniformizable and realcompact bornological universes [PDF]

open access: yesApplied General Topology, 2009
Bornological universes were introduced some time ago by Hu and obtained renewed interest in recent articles on convergence in hyperspaces and function spaces and optimization theory.
Tom Vroegrijk
doaj   +7 more sources

Injectivity results for coarse homology theories

open access: yesProceedings of the London Mathematical Society, Volume 121, Issue 6, Page 1619-1684, December 2020., 2020
Abstract We show injectivity results for assembly maps using equivariant coarse homology theories with transfers. Our method is based on the descent principle and applies to a large class of linear groups or, more generally, groups with finite decomposition complexity.
Ulrich Bunke   +3 more
wiley   +1 more source

Soft Bornological Group Acts on Soft Bornological Set

open access: yesIraqi Journal of Science, 2023
        In this paper, we introduce the notation of the soft bornological group to solve the problem of boundedness for the soft group. We combine soft set theory with bornology space to produce a new structure which is called    soft bornological group. So that both the product and inverse maps are soft bounded. As well as, we study the actions of the
Ashwaq F. Abdal   +3 more
openaire   +1 more source

On cardinalities and compact closures

open access: yesApplied General Topology, 2017
We show that there exists a Hausdorff topology on the set R of real numbers such that a subset A of R has compact closure if and only if A is countable.
Mike Krebs
doaj   +1 more source

Bornological Convergence and Shields

open access: yesMediterranean Journal of Mathematics, 2011
Starting with an ideal \(\mathcal{S}\), that is, a family \(\mathcal{S}\) of nonempty subsets of a metric space \(\langle X,d\rangle\) that is closed with respect to taking finite unions and taking nonempty subsets and considering the \(\epsilon\)-enlargement of a set \(E\subseteq X\) (for \(\epsilon>0\)), defined by \(E^\epsilon:=\bigcup_{a\in E}S_ ...
Beer, G: Costantini, C, LEVI, SANDRO
openaire   +3 more sources

Operator Ideals arising from Generating Sequences [PDF]

open access: yes, 2011
In this note, we will discuss how to relate an operator ideal on Banach spaces to the sequential structures it defines. Concrete examples of ideals of compact, weakly compact, completely continuous, Banach-Saks and weakly Banach-Saks operators will be ...
Wong, Ngai-Ching
core   +1 more source

Variational Approaches to Characterize Weak Solutions for Some Problems of Mathematical Physics Equations

open access: yesAbstract and Applied Analysis, Volume 2016, Issue 1, 2016., 2016
This paper is aimed at providing three versions to solve and characterize weak solutions for Dirichlet problems involving the p‐Laplacian and the p‐pseudo‐Laplacian. In this way generalized versions for some results which use Ekeland variational principle, critical points for nondifferentiable functionals, and Ghoussoub‐Maurey linear principle have ...
Irina Meghea, Khalil Ezzinbi
wiley   +1 more source

Extremal balleans

open access: yesApplied General Topology, 2019
A ballean (or coarse space) is a set endowed with a coarse structure. A ballean X is called normal if any two asymptotically disjoint subsets of X are asymptotically separated.
Igor Protasov
doaj   +1 more source

Bornological Transformation Group

open access: yesJournal of Al-Qadisiyah for Computer Science and Mathematics, 2021
In this paper, the researcher recalls the definitions of bornological set & bornological group and gives some examples in detalis. Additionally, the primary goal of this research is to introduce bornological transformation group, which are formulated on bornological group acts on bornological set.
Farah J. Sadiq   +2 more
openaire   +1 more source

Abstract Theorems on Exchange of Limits and Preservation of (Semi)continuity of Functions and Measures in the Filter Convergence Setting

open access: yesJournal of Function Spaces, Volume 2016, Issue 1, 2016., 2016
We give necessary and sufficient conditions for exchange of limits of double‐indexed families, taking values in sets endowed with an abstract structure of convergence, and for preservation of continuity or semicontinuity of the limit family, with respect to filter convergence.
Antonio Boccuto   +2 more
wiley   +1 more source

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