Results 11 to 20 of about 915,771 (329)

On Two Properties of Shunkov Group

open access: yesИзвестия Иркутского государственного университета: Серия "Математика", 2021
One of the interesting classes of mixed groups ( i.e. groups that can contain both elements of finite order and elements of infinite order) is the class of Shunkov groups. The group $G$ is called Shunkov group if for any finite subgroup $H$ of $G$ in the
A.A. Shlepkin, I. V. Sabodakh
doaj   +1 more source

Growth of periodic quotients of hyperbolic groups [PDF]

open access: yes, 2012
Let G be a non-elementary torsion-free hyperbolic group. We prove that the exponential growth rate of the periodic quotient G/G^n tends to the one of G as n odd approaches infinity. Moreover we provide an estimate at which the convergence is taking place.
Coulon, Rémi
core   +2 more sources

On Periodic Groups and Shunkov Groups that are Saturated by Dihedral Groups and $A_5$

open access: yesИзвестия Иркутского государственного университета: Серия "Математика", 2017
A group is said to be periodic, if any of its elements is of finite order. A Shunkov group is a group in which any pair of conjugate elements generates Finite subgroup with preservation of this property when passing to factor groups by finite Subgroups ...
A. Shlepkin
doaj   +1 more source

On Periodic Groups of Shunkov with the Chernikov Centralizers of Involutions

open access: yesИзвестия Иркутского государственного университета: Серия "Математика", 2020
Layer-finite groups first appeared in the work by S.~N.~Chernikov (1945). Almost layer-finite groups are extensions of layer-finite groups by finite groups.
V.I. Senashov
doaj   +1 more source

Properties of groups with points [PDF]

open access: yesIranian Journal of Numerical Analysis and Optimization, 2009
In this paper, we consider groups with points which were introduced by V.P. Shunkov in 1990. In Novikov-Adian's group, Adian's periodic products of finite groups without involutions and Olshansky's periodic monsters every non-unit element is a point ...
V.I. Senashov, E.N. Takovleva
doaj   +1 more source

Some classes of minimally almost periodic topological groups

open access: yesApplied General Topology, 2015
A Hausdorff topological group G=(G,T) has the small subgroup generating property (briefly: has the SSGP property, or is an SSGP group) if for each neighborhood U of $1_G$ there is a family $\sH$ of subgroups of $G$ such that $\bigcup\sH\subseteq U$ and $\
Wistar Comfort, Franklin R. Gould
doaj   +1 more source

Almost periodic transformation groups [PDF]

open access: yesTransactions of the American Mathematical Society, 1937
1. In view of the recent work on topological groups it is natural to consider the situation which arises when such groups act as transformation groups on various types of spaces. Such a study is begun here from the point of view of almost periodic transformation groups, the definition of which is suggested by von Neumann's paper on almost periodic ...
openaire   +2 more sources

Weakly almost periodic functions, model-theoretic stability, and minimality of topological groups [PDF]

open access: yes, 2015
We investigate the automorphism groups of $\aleph\_0$-categorical structures and prove that they are exactly the Roelcke precompact Polish groups. We show that the theory of a structure is stable if and only if every Roelcke uniformly continuous function
Tsankov, Todor, Yaacov, Itaï Ben
core   +1 more source

Beta to theta power ratio in EEG periodic components as a potential biomarker in mild cognitive impairment and Alzheimer’s dementia

open access: yesAlzheimer’s Research & Therapy, 2023
Background Alzheimer’s dementia (AD) is associated with electroencephalography (EEG) abnormalities including in the power ratio of beta to theta frequencies.
Hamed Azami   +14 more
doaj   +1 more source

Finiteness results for subgroups of finite extensions [PDF]

open access: yes, 2014
We discuss in the context of finite extensions two classical theorems of Takahasi and Howson on subgroups of free groups. We provide bounds for the rank of the intersection of subgroups within classes of groups such as virtually free groups, virtually ...
Araujo, Vitor   +2 more
core   +2 more sources

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