Results 31 to 40 of about 450,572 (319)

The equivalent condition of G-asymptotic tracking property and G-Lipschitz tracking property

open access: yesOpen Mathematics, 2022
In this paper, we introduce the concepts of GG-Lipschitz tracking property and GG-asymptotic tracking property in metric GG-space and obtain the equivalent conditions of GG-asymptotic tracking property in metric GG-space.
Ji Zhanjiang
doaj   +1 more source

★-quasi-pseudometrics on algebraic structures

open access: yesApplied General Topology, 2023
In this paper, we introduce some concepts of ★-(quasi)-pseudometric spaces, and give an example which shows that there is a ★-quasi-pseudometric space which is not a quasi-pseudometric space.
Shi-Yao He, Ying-Ying Jin, Li-Hong Xie
doaj   +1 more source

Projective Topological Groups [PDF]

open access: yesProceedings of the American Mathematical Society, 1967
The notion of a projective topological group for a category of topological groups has been defined by Hofmann [4]. Free topological groups have been of interest in the study of topological groups since theirinventionby Markov [5]. It is the purpose of this paper to develop the concept of projective in the category of Abelian topological groups, based ...
openaire   +2 more sources

Free Boolean Topological Groups

open access: yesAxioms, 2015
Known and new results on free Boolean topological groups are collected. An account of the properties that these groups share with free or free Abelian topological groups and properties specific to free Boolean groups is given.
Ol’ga Sipacheva
doaj   +1 more source

Pseudo-Normality and Pseudo-Tychonoffness of Topological Groups

open access: yesMathematics
It is common knowledge that any topological group that satisfies the lowest separation axiom, T0, is immediately Hausdorff and completely regular; however, this is not the case for normality.
Mesfer H. Alqahtani   +3 more
doaj   +1 more source

On certain groups of functions

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1980
Let C(X,G) denote the group of continuous functions from a topological space X into a topological group G with the pointwise multiplication and the compact-open topology. We show that there is a natural topology on the collection of normal subgroups Δ(X)
J. S. Yang
doaj   +1 more source

Atomic topological groups

open access: yesAdvances in Group Theory and Applications, 2018
We investigate the atoms of the lattice L(G) of all group topologies on a group G by using the close connection between atoms of L(G), and minimal Hausdorff elements of the lattice L (G/N) for appropriate quotient groups G/N. We show, among others, that virtually hypercentral groups have only degenerate atoms.
Dikranjan D., Khass H., Bazigaran B.
openaire   +2 more sources

Non-Abelian Pseudocompact Groups

open access: yesAxioms, 2016
Here are three recently-established theorems from the literature. (A) (2006) Every non-metrizable compact abelian group K has 2|K| -many proper dense pseudocompact subgroups.
W. W. Comfort, Dieter Remus
doaj   +1 more source

Orbifold Construction for Topological Field Theories

open access: yes, 2018
An equivariant topological field theory is defined on a cobordism category of manifolds with principal fiber bundles for a fixed (finite) structure group. We provide a geometric construction which for any given morphism $G \to H$ of finite groups assigns
Schweigert, Christoph, Woike, Lukas
core   +1 more source

Recurrent and weakly recurrent points in βG

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1986
It is shown in this paper that if βG is the Stone-Čech compactification of a group G, and G satisfying a certain condition, then there is a weakly recurrent point in βG which is not almost periodic, and if another condition will be added, then there is a
Mostafa Nassar
doaj   +1 more source

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