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The purpose of this note is to start the systematic analysis of cofinal types of topological groups.

General Topology · Mathematics 2024-04-09 Boriša Kuzeljević , Stepan Milošević

We give a homological characterisation of relatively prosolvable projective groups.

Group Theory · Mathematics 2022-10-05 Pavel Zalesskii

An elementary approach to the construction of Coxeter group representations is presented.

Representation Theory · Mathematics 2007-05-23 Ron M. Adin , Francesco Brenti , Yuval Roichman

We prove a conjecture of Shokurov which characterises toric varieties using log pairs.

Algebraic Geometry · Mathematics 2018-05-23 Morgan Brown , James McKernan , Roberto Svaldi , Hong Zong

It is important to classify covering subgroups of the fundamental group of a topological space using their topological properties in the topologized fundamental group. In this paper, we introduce and study some topologies on the fundamental…

Algebraic Topology · Mathematics 2018-07-04 M. Ab dullahi Rashid , N. Jamali , B. Mashayekhy , S. Z. Pashaei , H. Torabi

We prove two isomorphism-invariance theorems for groupoids associated with ultragraphs. These theorems characterize ultragraphs for which the topological full group of an associated groupoid is an isomorphism invariant. These results extend…

Dynamical Systems · Mathematics 2020-05-06 Gilles Gonçalves de Castro , Daniel Gonçalves , Daniel W van Wyk

We characterize the groups isomorphic to full automorphism groups of ordered abelian groups. The result will follow from classical theorems on ordered groups adding an argument from proofs used to realize rings as endomorphism rings of…

Logic · Mathematics 2007-05-23 Rüdiger Göbel , Saharon Shelah

We classify positive transversal torus knots in tight contact structures up to transversal isotopy.

Geometric Topology · Mathematics 2014-11-11 John B. Etnyre

Torus orbifolds are topological generalization of symplectic toric orbifolds. We give a construction of smooth orbifolds with torus actions whose boundary is a disjoint union of torus orbifolds using toric topological method. As a result,…

Algebraic Topology · Mathematics 2019-05-21 Soumen Sarkar , Dong Youp Suh

In this paper we find all symplectic groups and their maximal tori in which normalizer of a torus is split over the torus.

Group Theory · Mathematics 2015-06-15 A. A. Galt

In this note, finite type epimorphisms of rings are characterized.

Commutative Algebra · Mathematics 2018-03-20 Abolfazl Tarizadeh

In this paper, we pose the concepts of pre-topological groups and some generalizations of pre-topological groups. First, we systematically investigate some basic properties of pre-topological groups; in particular, we prove that each…

General Topology · Mathematics 2022-03-22 Fucai Lin , Ting Wu , Yufan Xie , Meng Bao

We determine the groups which can appear as the normalizer of a maximal torus in a connected 2-compact group. The technique depends on using ideas of Tits to give a novel description of the normalizer of the torus in a connected compact Lie…

Group Theory · Mathematics 2014-11-11 WG Dwyer , CW Wilkerson

This article contains is concerned with noncommutative analogue of topological finitely listed covering projections. In my previous article I have already find a family of covering projections of the noncommutative torus. This article…

Operator Algebras · Mathematics 2014-02-11 Petr Ivankov

This is an attempt to look at the tropical geometry from topological point of view.

Algebraic Topology · Mathematics 2011-05-31 Hadi Zare

We study topological group theoretic properties of algebraic groups over local fields. In particular, we find conditions under which such groups have closed images under arbitrary continuous homomorphisms into arbitrary topological groups.

Group Theory · Mathematics 2023-01-04 Uri Bader , Elyasheev Leibtag

We introduce and study the class of spherically ordered groups. The notions of spherically ordered groups and their spectra of spherical orderability are introduced. Values of these spectra are found for a series of natural groups.

Group Theory · Mathematics 2024-07-19 Sergey V. Sudoplatov

Free actions of finite groups on spheres give rise to topological spherical space forms. The existence and classification problems for space forms have a long history in the geometry and topology of manifolds. In this article, we present a…

Geometric Topology · Mathematics 2017-08-29 Ian Hambleton

Some boundedness properties of function spaces (considered as topological groups) are studied.

General Topology · Mathematics 2017-10-31 L'ubica Holá , Ljubiša D. R. Kočinac

Every locally compact local group is locally isomorphic to a topological group.

Differential Geometry · Mathematics 2010-03-05 Lou van den Dries , Isaac Goldbring