Results 21 to 30 of about 404,274 (272)

Complete Invariant ⋆-Metrics on Semigroups and Groups

open access: yesAxioms, 2022
In this paper, we study the complete ⋆-metric semigroups and groups and the Raǐkov completion of invariant ⋆-metric groups. We obtain the following. (1) Let (X,d⋆) be a complete ⋆-metric space containing a semigroup (group) G that is a dense subset of X.
Shi-Yao He, Jian-Cai Wei, Li-Hong Xie
doaj   +1 more source

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

Advances in the Theory of Compact Groups and Pro-Lie Groups in the Last Quarter Century

open access: yesAxioms, 2021
This article surveys the development of the theory of compact groups and pro-Lie groups, contextualizing the major achievements over 125 years and focusing on some progress in the last quarter century.
Karl H. Hofmann, Sidney A. Morris
doaj   +1 more source

A Study on Neutrosophic Bitopological Group [PDF]

open access: yesNeutrosophic Sets and Systems, 2020
In this paper we try to introduce neutrosophic bitopological group. We try to investigate some new definition and properties of neutrosophic bitopological group.
Bhimraj Basumatary, Nijwm Wary
doaj   +1 more source

A convenient category of topological partial groups

open access: yesJournal of the Egyptian Mathematical Society, 2019
In this paper, the concept of ℘-continuous map is introduced and some of their basic properties are discussed. Also, the category Ḱ $\mathbf {K}\acute {}$, of topological partial groups, as objects and the ℘-morphisms of topological partial groups, as ...
A. Fathy
doaj   +1 more source

Separability of Topological Groups: A Survey with Open Problems

open access: yesAxioms, 2018
Separability is one of the basic topological properties. Most classical topological groups and Banach spaces are separable; as examples we mention compact metric groups, matrix groups, connected (finite-dimensional) Lie groups; and the Banach spaces ...
Arkady G. Leiderman, Sidney A. Morris
doaj   +1 more source

On monotonic bijections on subgroups of R

open access: yesApplied General Topology, 2016
We show that for any continuous monotonic  bijection $f$ on a $\sigma$-compact subgroup  $G\subset \mathbb R$ there exists a binary operation $+_f$ such that $\langle G, +_f\rangle$  is a topological group topologically isomorphic to $\langle G, +\rangle$
Raushan Buzyakova
doaj   +1 more source

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

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

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

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