Results 21 to 30 of about 7,271 (214)

Norms of Schur multipliers

open access: yesIllinois Journal of Mathematics, 2007
23 ...
Davidson, Kenneth R., Donsig, Allan P.
openaire   +3 more sources

Quasi-nilpotency of generalized Volterra operators on sequence spaces

open access: yes, 2021
We study the quasi-nilpotency of generalized Volterra operators on spaces of power series with Taylor coefficients in weighted $\ell^p$ spaces ...
Chalmoukis, Nikolaos   +1 more
core   +1 more source

Finite groups with the same conjugacy class sizes as a finite simple group [PDF]

open access: yesInternational Journal of Group Theory, 2019
For a finite group $H$‎, ‎let $cs(H)$ denote the set of non-trivial conjugacy class sizes of $H$ and $OC(H)$ be the set of the order components of $H$‎. ‎In this paper‎, ‎we show that if $S$ is a finite simple group with the disconnected prime graph and $
Neda Ahanjideh
doaj   +1 more source

Cycles and 1-unconditional matrices [PDF]

open access: yes, 2004
We characterize the 1-unconditional subsequences of the canonical basis (e_rc) of elementary matrices in the Schatten-von-Neumann class S^p . The set I of couples (r,c) must be the set of edges of a bipartite graph without cycles of even length ...
Neuwirth, Stefan
core   +3 more sources

Determine the value d(M(G)) for non-abelian p-groups of order q = pnk of Nilpotency c

open access: yesRatio Mathematica, 2020
In this paper we prove that if n, k and t be positive integer numbers such that t < k < n and G is a non abelian p-group of order pnk  with derived subgroup of order pkt  and nilpotency class c, then the minimal number of generators of G is at most p1 2 (
Behnam Razzaghmaneshi
doaj   +1 more source

Closable Multipliers [PDF]

open access: yes, 2010
Let (X,m) and (Y,n) be standard measure spaces. A function f in $L^\infty(X\times Y,m\times n)$ is called a (measurable) Schur multiplier if the map $S_f$, defined on the space of Hilbert-Schmidt operators from $L_2(X,m)$ to $L_2(Y,n)$ by multiplying ...
Shulman, V. S.   +2 more
core   +2 more sources

Transfer of Fourier multipliers into Schur multipliers and sumsets in a discrete group [PDF]

open access: yes, 2010
We inspect the relationship between relative Fourier multipliers on noncommutative Lebesgue-Orlicz spaces of a discrete group and relative Toeplitz-Schur multipliers on Schatten-von-Neumann-Orlicz classes.
Neuwirth, Stefan, Ricard, Éric
core   +5 more sources

Bogomolov multipliers for some $p$-groups of nilpotency class 2 [PDF]

open access: yes, 2016
The Bogomolov multiplier $B_0(G)$ of a finite group $G$ is defined as the subgroup of the Schur multiplier consisting of the cohomology classes vanishing after restriction to all abelian subgroups of $G$.
Michailov, Ivo M.
core   +1 more source

The partial Schur multiplier of a group

open access: yesJournal of Algebra, 2013
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Dokuchaev, M., Novikov, B., Pinedo, H.
openaire   +1 more source

Positive Herz-Schur multipliers and approximation properties of crossed products [PDF]

open access: yes, 2017
For a $C^*$-algebra $A$ and a set $X$ we give a Stinespring-type characterisation of the completely positive Schur $A$-multipliers on $K(\ell^2(X))\otimes A$.
McKee, Andrew   +3 more
core   +3 more sources

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