Results 31 to 40 of about 27,367 (272)

Groups with minimax commutator subgroup [PDF]

International Journal of Group Theory, 2014
A result of Dixon, Evans and Smith shows that if $G$ is a locally (soluble-by-finite) group whose proper subgroups are (finite rank)-by-abelian, then $G$ itself has this property, i.e. the commutator subgroup of~$G$ has finite rank.
Francesco de Giovanni, Trombetti
doaj  

Acoustic-Based Fault Diagnosis of Commutator Motor

Electronics, 2018
In the paper, the author presents acoustic-based fault diagnosis of a commutator motor (CM). Five states of the commutator motor were considered: healthy commutator motor, commutator motor with broken rotor coil, commutator motor with shorted stator ...
A. Głowacz
semanticscholar   +1 more source

BFC-theorems for higher commutator subgroups [PDF]

Quarterly Journal of Mathematics, 2018
A BFC-group is a group in which all conjugacy classes are finite with bounded size. In 1954, B. H. Neumann discovered that if G is a BFC-group then the derived group G′ is finite. Let w=w(x1,…,xn) be a multilinear commutator.
E. Detomi, M. Morigi, P. Shumyatsky
semanticscholar   +1 more source

A note on rings with certain variables identities

International Journal of Mathematics and Mathematical Sciences, 1989
It is proved that certain rings satisfying generalized-commutator constraints of the form [xm,yn,yn,...,yn]=0 with m and n depending on x and y, must have nil commutator ideal.
Hazar Abu-Khuzam
doaj   +1 more source

Vibration-Based Fault Diagnosis of Commutator Motor

Shock and Vibration, 2018
This paper presents a study on vibration-based fault diagnosis techniques of a commutator motor (CM). Proposed techniques used vibration signals and signal processing methods. The authors analysed recognition efficiency for 3 states of the CM: healthy CM,
A. Głowacz, W. Glowacz
semanticscholar   +1 more source

Carleman commutator approach in logarithmic convexity for parabolic equations [PDF]

, 2018
In this paper we investigate on a new strategy combining the logarithmic convexity (or frequency function) and the Carleman commutator to obtain an observation estimate at one time for the heat equation in a bounded domain.
K. Phung
semanticscholar   +1 more source

Weighted Morrey estimates for Hausdorff operator and its commutator on the Heisenberg group [PDF]

Mathematical Inequalities & Applications, 2017
In this paper, we study the high-dimensional Hausdorff operators, defined via a general linear mapping $A$, and their commutators on the weighted Morrey spaces in the setting of the Heisenberg group. Particularly, under some assumption on the mapping $A$,
J. Ruan, D. Fan, Qingyan Wu
semanticscholar   +1 more source

Generating Sets and a Structure of the Wreath Product of Groups with Non-Faithful Group Action

International Journal of Analysis and Applications, 2020
Given a permutational wreath product sequence of cyclic groups, we investigate its minimal generating set, the minimal generating set for its commutator and some properties of its commutator subgroup.
Ruslan Skuratovskii
doaj  

Stone and Flat Topologies on the Minimal Prime Spectrum of a Commutator Lattice

Axioms
In previous work we have studied minimal prime spectra, as well as extensions of universal algebras whose term condition commutator behaves like the modular commutator in the sense that it is commutative and distributive with respect to arbitrary joins ...
George Georgescu, Leonard Kwuida, Claudia Mureşan   +2 more
doaj   +1 more source

Quasiperiodic and mixed commutator factorizations in free products of groups [PDF]

Bulletin of the London Mathematical Society, 2017
It is well known that a nontrivial commutator in a free group is never a proper power. We prove a theorem that generalizes this fact and has several worthwhile corollaries.
S. Ivanov, A. Klyachko
semanticscholar   +1 more source