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Finite rank and pseudofinite groups [PDF]

open access: green, 2018
It is proven that an infinite finitely generated group cannot be elementarily equivalent to an ultraproduct of finite groups of a given Pr\"ufer rank.
Daniel Palacín
openalex   +3 more sources

Finite rank intermediate Hankel operators and the big Hankel operator [PDF]

open access: goldInternational Journal of Mathematics and Mathematical Sciences, 2006
Let La2 be a Bergman space. We are interested in an intermediate Hankel operator HφM from La2 to a closed subspace M of L2 which is invariant under the multiplication by the coordinate function z.
Tomoko Osawa
doaj   +2 more sources

A remark on the rank of finite $p$-groups of birational automorphisms [PDF]

open access: diamondComptes Rendus. Mathématique, 2020
In this note, we improve a result of Prokhorov and Shramov on the rank of finite $p$-subgroups of the group of birational transformations of a rationally connected variety. Known examples show that the bounds obtained are optimal in many cases.
Xu, Jinsong
doaj   +2 more sources

Topological mixing properties of rank‐one subshifts

open access: yesTransactions of the London Mathematical Society, 2019
We study topological mixing properties and the maximal equicontinuous factor of rank‐one subshifts as topological dynamical systems. We show that the maximal equicontinuous factor of a rank‐one subshift is finite. We also determine all the finite factors
Su Gao, Caleb Ziegler
doaj   +2 more sources

Finite groups of conjugate rank 2 [PDF]

open access: bronzeNagoya Mathematical Journal, 1974
In 1953 N. Itô defined the conjugate rank of a finite group as the number of distinct sizes, not equal to 1, of the conjugacy classes of the group [7].
A. R. Camina
openalex   +4 more sources

Groups whose proper subgroups of infinite rank have polycyclic-by-finite conjugacy classes [PDF]

open access: greenInternational Journal of Group Theory, 2016
A group G is said to be a (PF)C-group or to have polycyclic-by-finite conjugacy classes, if G/C_{G}(x^{G}) is a polycyclic-by-finite group for all xin G. This is a generalization of the familiar property of being an FC-group.
Mounia Bouchelaghem, Nadir Trabelsi
doaj   +1 more source

FINITE RANK RIESZ OPERATORS [PDF]

open access: yesGlasgow Mathematical Journal, 2013
AbstractWe provide conditions under which a Riesz operator defined on a Banach space is a finite rank operator.
Koumba, U., Raubenheimer, H.
openaire   +1 more source

On the relationships between the factors of the upper and lower central series in some non-periodic groups [PDF]

open access: yesInternational Journal of Group Theory, 2018
This paper deals with the mutual relationships between the factor group $G/zeta(G)$ (respectively $G/zeta_k(G)$) and $G'$ (respectively $gamma_{k+1}(G)$ and $G^{mathfrak{N}}$).
Martyn Dixon   +2 more
doaj   +1 more source

Invariable generation of groups of finite rank [PDF]

open access: yesAdvances in Group Theory and Applications, 2018
We prove that the minimal cardinality of an invariable generating set for a finite group G can be bounded in terms of the rank of G and we discuss some related questions.
Eloisa Detomi   +2 more
doaj   +1 more source

Some remarks about groups of finite special rank [PDF]

open access: yesAdvances in Group Theory and Applications, 2016
The paper presents some results about groups of finite special and section ranks. For instance, among others, it was proved that if every locally (soluble minimax) subgroup of a generalized radical group G has finite special rank, then G has finite ...
L.A. Kurdachenko   +2 more
doaj   +1 more source

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