Results 21 to 30 of about 509 (50)

Nuclear JC‐algebras and tensor products of types

, 1992
International Journal of Mathematics and Mathematical Sciences, Volume 16, Issue 4, Page 717-723, 1993.
Fatmah B. Jamjoom
wiley   +1 more source

A note on the existence of BH(19,6) matrices [PDF]

, 2012
In this note we utilize a non-trivial block approach due to M. Petrescu to exhibit a Butson-type complex Hadamard matrix of order 19, composed of sixth roots of unity.Comment: 3 pages ...
Szöllősi, Ferenc
core  

Quantum injectivity of G-frames in Hilbert spaces

Demonstratio Mathematica
Inspired by some recent work on the quantum detection problem by discrete frames and continuous frames, in this article, we examine the quantum detection problem with G-frames.
Hong Guoqing, Wan Linbin, Zhang Jianxia
doaj   +1 more source

A generalization of the weak amenability of some Banach algebra [PDF]

, 2010
Let $A$ be a Banach algebra and $A^{**}$ be the second dual of it. We show that by some new conditions, $A$ is weakly amenable whenever $A^{**}$ is weakly amenable. We will study this problem under generalization, that is, if $(n+2)-th$ dual of $A$, $A^{(
Azar, Kazem Haghnejad
core   +1 more source

On the first continuous $L^2$-cohomology of free group factors

, 2014
We prove that the first continuous $L^2$-cohomology of free group factors vanishes. This answers a question by Andreas Thom regarding continuity properties of free difference quotients and shows that one can not distinguish free group factors by means of
Alekseev, Vadim
core   +1 more source

On pairs of automorphisms of von Neumann algebras

, 1989
International Journal of Mathematics and Mathematical Sciences, Volume 12, Issue 2, Page 285-290, 1989.
A. B. Thaheem
wiley   +1 more source

Arens regularity of module actions and weak amenability of Banach algebras [PDF]

, 2010
For Banach left and right module actions, we will establish the relationships between topological centers of module actions with some result in the weak amenability of Banach ...
Azar, Kazem Haghnejad
core  

Strong singularity of singular masas in II₁ factors [PDF]

, 2007
A singular masa A in a II1 factor N is defined by the property that any unitary w ∈ N for which A=wAw* must lie in A. A strongly singular masa A is one that satisfies the inequality ||EA- EwAw*||∞,2 ≥||w- EA(w)||2 for all unitaries ...
Sinclair, A.M., Smith, R.R., White, S.A., Wiggins, A.   +3 more
core  

Pinchings and Positive linear maps

, 2015
We employ the pinching theorem, ensuring that some operators A admit any sequence of contractions as an operator diagonal of A, to deduce/improve two recent theorems of Kennedy-Skoufranis and Loreaux-Weiss for conditional expectations onto a masa in the ...
Bourin, Jean-Christophe, Lee, Eun-Young
core   +1 more source

Complex Hadamard matrices and Equiangular Tight Frames [PDF]

, 2011
In this paper we give a new construction of parametric families of complex Hadamard matrices of square orders, and connect them to equiangular tight frames. The results presented here generalize some of the recent ideas of Bodmann et al.
Szöllősi, Ferenc
core