Results 31 to 40 of about 66 (65)

On the Borel complexity and the complete metrizability of spaces of metrics

open access: yesAnalysis and Geometry in Metric Spaces
Given a metrizable space XX, let AM(X)AM\left(X) be the space of continuous bounded admissible metrics on XX, which is endowed with the sup-metric. In this article, we shall investigate the Borel complexity and the complete metrizability of AM(X)AM\left ...
Koshino Katsuhisa
doaj   +1 more source

On τ−covers using ideals and some of its consequences

open access: yes, 2019
In this paper we primarily introduce an ideal version of τ-covers studied in [18, 19]. We establish the inter-relationships between I-τ-covers and I-γ , I-large [3, 5] and κ-covers[2, 7].
Chandra, Debraj   +2 more
core  

Exponential law and theta-continuous functions

open access: yes, 1985
The category θ-Top of topological spaces and θ-continuous functions is not Cartesian closed; but it is known that under certain local property assumptions, the exponential law in θ-Top is fulfilled.
DI CONCILIO, Anna
core  

Precompactness And Compactness In The Natural Function Spaces Of The Category Of Semiuniform Convergence Spaces

open access: yes, 1997
. Semiuniform convergence spaces form a common generalization of (symmetric) limit spaces (and thus of symmetric topological spaces) as well as of uniform limit spaces (and thus of uniform spaces) with many convenient properties such as cartesian ...
Gerhard Preu, Gerhard Preuß
core  

Two point-picking games derived from a property of function spaces

open access: yes, 2018
We present a study of two versions of the point-picking game defined by Berner and Juhasz. Given a space X there are two rivals O and P who take turns playing on X. In the n-th round Player O takes a non-empty open subset Un of the space X and P responds
Tkachuk, Vladimir V.
core  

Function Algebras And The Lattice Of Compactifications

open access: yes, 2007
. We provide some conditions as to when K(X) ¸ = K(Y ) for two locally compact spaces X and Y (where K(X) is the lattice of all Hausdorff compactifications of X). More specifically, we prove that K(X) ¸ = K(Y ) if and only if C (X)=C 0 (X) ¸ = C
Franklin Mendivil
core  

MR2502017 (2010c:46055) Angosto, C.; Cascales, B. Measures of weak noncompactness in Banach spaces. Topology Appl. 156 (2009), no. 7, 1412--1421. (Reviewer: Diana Caponetti) 46B99 (46A50 47B07 47H09 54C35)

open access: yes, 2010
The authors consider for a bounded subset H of a Banach space E the De Blasi measure of weak noncompactness w(H) and the measure of weak noncompactness g(H) based on Grothendieck’s double limit criterion.
CAPONETTI, Diana
core  

LΣ(≤ ω)-spaces and spaces of continuous functions

open access: yesOpen Mathematics, 2010
Lara Israel, Okunev Oleg
doaj   +1 more source

Spaces of measurable functions

open access: yesOpen Mathematics, 2013
Niemiec Piotr
doaj   +1 more source

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