Results 11 to 20 of about 2,502,258 (319)

Weakly compact operators on operator algebras [PDF]

Pacific Journal of Mathematics, 1964
S. Sakai
openaire   +4 more sources

The relation between b-weakly compact operator and KB-operator

Turkish Journal of Mathematics, 2019
Our aim is to solve the problem asked by Bahramnezhad and Azar in "KB-operators on Banach lattices and their relationships with Dunford-Pettis and order weakly compact operators".
Bahri Turan, B. Altın
semanticscholar   +1 more source

Representing the Banach operator ideal of completely continuous operators; pp. 189–193 [PDF]

Proceedings of the Estonian Academy of Sciences, 2017
Let V ;W∞ and W be the operator ideals of completely continuous, weakly ∞-compact, and weakly compact operators, respectively. In a recent paper, William B. Johnson, Eve Oja, and the author proved that V = W∞ ◦W -1 (Johnson, W. B., Lillemets, R.,
Rauni Lillemets
doaj   +1 more source

Nonlinear contraction and fuzzy compact operator in fuzzy Banach algebras

Fixed Point Theory, 2019
In this paper, at first, we consider the concept of fuzzy Banach algebras and fuzzy compact operators. Then we apply a fixed point theorem to solve the operator equation AxBx = x in the fuzzy Banach algebras under a nonlinear contraction.
R. Saadati
semanticscholar   +1 more source

A hyperbolic universal operator commuting with a compact operator [PDF]

, 2019
A Hilbert space operator is called universal (in the sense of Rota) if every operator on the Hilbert space is similar to a multiple of the restriction of the universal operator to one of its invariant subspaces.
Cowen, Carl C., Gallardo-Gutiérrez, Eva A.   +1 more
core   +1 more source

Composition operator induced by ?(z) = sz + t for which |s|?1, |t|<1 and |s|+|t|?1

مجلة بغداد للعلوم, 2010
We study in this paper the composition operator that is induced by ?(z) = sz + t. We give a characterization of the adjoint of composiotion operators generated by self-maps of the unit ball of form ?(z) = sz + t for which |s|?1, |t|
Baghdad Science Journal
doaj   +1 more source

Operator amenability of Fourier-Stieltjes algebras [PDF]

, 2003
The notion of operator amenability was introduced by Z.-J. Ruan in 1995. He showed that a locally compact group G is amenable if and only if its Fourier algebra A(G) is operator amenable.
Runde, Volker, Spronk, Nico
core   +1 more source

Properties of Fuzzy Compact Linear Operators on Fuzzy Normed Spaces

مجلة بغداد للعلوم, 2019
In this paper the definition of fuzzy normed space is recalled and its basic properties. Then the definition of fuzzy compact operator from fuzzy normed space into another fuzzy normed space is introduced after that the proof of an operator is fuzzy ...
Kider et al.
doaj   +1 more source

Convergence analysis of LSQR for compact operator equations

, 2019
In this paper we analyze the behavior of the LSQR algorithm for the solution of compact operator equations in Hilbert spaces. We present results concerning existence of Krylov solutions and the rate of convergence in terms of an l p sequence where p ...
N. Caruso, P. Novati
semanticscholar   +1 more source

Extension of Compact Operators from DF-spaces to C(K) spaces

Applied General Topology, 2006
It is proved that every compact operator from a DF-space, closed subspace of another DF-space, into the space C(K) of continuous functions on a compact Hausdorff space K can be extended to a compact operator of the total DF-space.
Fernando Garibay Bonales, Rigoberto Vera Mendoza   +1 more
doaj   +1 more source