Results 31 to 40 of about 6,050,140 (310)

Large groups and their periodic quotients [PDF]

open access: yesProceedings of the American Mathematical Society, 2007
We first give a short group theoretic proof of the following result of Lackenby. If G G is a large group,
Olshanskii, A. Yu., Osin, D. V.
openaire   +3 more sources

Computation of Kalman Decompositions of Periodic Systems [PDF]

open access: yes, 2003
We consider the numerically reliable computation of reachability and observability Kalman decompositions of a periodic system with time-varying dimensions.
A. Varga   +3 more
core   +1 more source

A Periodic Systems Toolbox for MATLAB [PDF]

open access: yes, 2005
The recently developed Periodic Systems Toolbox for MATLAB is described. The basic approach to develop this toolbox was to exploit the powerful object manipulation features of MATLAB via flexible andfunctionally rich high level m-functions, while ...
A. Varga, Varga, A.
core   +1 more source

A remark on group rings of periodic groups [PDF]

open access: yesInternational Journal of Group Theory, 2016
A positive solution of the problem of the existence of nontrivial pairs of zero-divisors in group rings of free Burnside groups of sufficiently large odd periods $n>10^{10}$ obtained previously by S. V. Ivanov and R. Mikhailov extended to all odd periods
Artur Grigoryan
doaj  

Groups with a Strongly Embedded Subgroup Saturated with Finite Simple Non-abelian Groups

open access: yesИзвестия Иркутского государственного университета: Серия "Математика", 2020
An important concept in the theory of finite groups is the concept of a strongly embedded subgroup. The fundamental result on the structure of finite groups with a strongly embedded subgroup belongs to M. Suzuki.
A.A. Shlepkin
doaj   +1 more source

catena-Poly[[diaquabis(1,3-dihydro-3-oxoisobenzofuran-1-acetato)copper(II)]-μ-N,N′-(ethane-1,2-diyl)dinicotinamide]

open access: yesIUCrData, 2023
The title compound, {[Cu(C10H7O4)2(C14H14N4O2)(H2O)2]n, contains octahedrally coordinated CuII ions ligated by two bis(1,3-dihydro-3-oxo-1-isobenzofuranacetate (dibf) ligands and two trans water molecules, linked by N,N′-(ethane-1,2-diyl)dinicotinamide ...
Sean R. Pumford, Robert L. LaDuca
doaj   +1 more source

Locally Finite Groups Saturated with Direct Product of Two Finite Dihedral Groups

open access: yesИзвестия Иркутского государственного университета: Серия "Математика", 2023
In the study of infinite groups, as a rule, some finiteness conditions are imposed. For example, the group is required to be periodic, Shunkov group, Frobenius group, locally finite group.
A. V. Kukharev, A.A. Shlepkin
doaj   +1 more source

On computing inner-outer factorizations of periodic systems [PDF]

open access: yes, 2013
A numerically reliable state space algorithm is proposed for computing inner-outer factorizations of causal periodic descriptor systems. The main computational ingredients are the computation of a special condensed Kronecker-like form of periodic ...
Varga, Andreas, Andreas Varga
core   +1 more source

On a Sufficient Condition for the Existence of a Periodic Part in the Shunkov Group

open access: yesИзвестия Иркутского государственного университета: Серия "Математика", 2017
The group $ G $ is saturated with groups from the set of groups if any a finite subgroup $ K $ of $ G $ is contained in a subgroup of $ G $, which is isomorphic to some group in $ \mathfrak{X} $.
A.A. Shlepkin
doaj   +1 more source

Solution of Positive Periodic Discrete Lyapunov Equations with Applications to the Balancing of Periodic Systems. [PDF]

open access: yes, 1997
The discrete-time positive periodic Lyapunov equations have important applications in the balancing and potentially also in the model reduction of discrete-time periodic systems.
A. Varga, Varga, A., Andreas Varga
core   +1 more source

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