Results 31 to 40 of about 60 (60)

For eagles only: probably the most difficult proof of the Arzela-Ascoli theorem - via the Stone-Cech compactification

open access: yes, 2017
Let C(K) denote the Banach space of all (real or complex) continuous functions on a compact Hausdorff space K. We present a novel point of view on the classical Arzela-Ascoli theorem: For every pointwise bounded and equicontinuous subset F of C(K) there ...
Wojtowicz, Marek
core  

On some parallelism between complete regularity and zero-dimensionality

open access: yes, 2018
We explore some parallelism between the categories CRFrm and 0DFrm of completely regular frames and zero-dimensional frames, respectively, with a view to establishing zero-dimensional analogues of C*-quotients.
Ighedo, Oghenetega, Mugochi, Martin M.
core  

The Topological Universe Of Locally Precompact Semiuniform Convergence Spaces

open access: yes, 1996
. The importance of local precompactness has become apparent in theorems of the Ascoli type proved by Bentley and Herrlich [3] in the realm of filter spaces as well as by Wyler [14] in the realm of uniform limit spaces.
Gerhard Preuß
core  

Compactness with respect to a convergence structure

open access: yes, 2004
A convergence structure for a category is given by determining convergent nets and their limits for each object of this category under validity of some basic convergence axioms.
Šlapal, Josef
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  

Псевдокомпактни полу-топологични групи

open access: yes, 2012
Митрофан М. Чобан, Петър Ст. Кендеров, Уорън Б. Муурс - Полу-топологична група (съответно, топологична група) е група, снабдена с топология, относно която груповата оперция произведение е частично непрекъсната по всяка от променливите (съответно ...
Kenderov, Petar   +2 more
core  

On lightly and countably compact spaces in ZF

open access: yes, 2019
Given a topological space X = (X, T), we show in the Zermelo-Fraenkel set theory ZF that:(i) Every locally finite family of open sets of X is finite iff every pairwise disjoint, locally finite family of open sets is finite.(ii) Every locally finite ...
Keremedis, Kyriakos
core  

The approximation of compacta by finite T0-spaces

open access: yes, 2004
It has long been known that compact Hausdorff spaces can be approximated using finite T0-spaces, and that many can be represented as inverse limits of polyhedra. Here we study the relationship between these two types of representation.
Tkachuk, Vladimir V   +2 more
core  

Group reflection and precompact paratopological groups

open access: yesTopological Algebra and its Applications, 2013
Tkachenko Mikhail
doaj   +1 more source

Boolean algebras admitting a countable minimally acting group

open access: yesOpen Mathematics, 2014
Błaszczyk Aleksander   +2 more
doaj   +1 more source

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