Results 1 to 10 of about 18,679 (117)

A Certain Class of Character Module Homomorphisms on Normed Algebras [PDF]

open access: yesSahand Communications in Mathematical Analysis, 2018
For two normed algebras $A$ and $B$ with the character space   $bigtriangleup(B)neq emptyset$  and a left $B-$module $X,$  a certain class of bounded linear maps from $A$ into $X$ is introduced.
Ali Reza Khoddami
doaj   +1 more source

Hypo-q-Norms on a Cartesian Product of Algebras of Operators on Banach Spaces

open access: yesAnnales Mathematicae Silesianae, 2020
In this paper we consider the hypo-q-operator norm and hypo-q-numerical radius on a Cartesian product of algebras of bounded linear operators on Banach spaces.
Dragomir Silvestru Sever
doaj   +1 more source

Centralizers in semisimple algebras, and descent spectrum in Banach algebras [PDF]

open access: yes, 2011
We prove that semisimple algebras containing some algebraic element whose centralizer is semiperfect are artinian. As a consequence, semisimple complex Banach algebras containing some element whose centralizer is algebraic are finite-dimensional.
Han, Z   +5 more
core   +1 more source

The Automatic Continuity of Linear Operators on Some Semi-Prime Banach Algebra [PDF]

open access: yesPure and Applied Mathematics Journal, 2015
Conditions are given for Banach algebras A and Banach algebras B which insure that every homomorphism T from A into B is automatic continuous. Similar results are obtained for derivations which either map the algebra A into itself.
openaire   +1 more source

Frobenius reciprocity and the Haagerup tensor product [PDF]

open access: yes, 2017
In the context of operator-space modules over C*-algebras, we give a complete characterisation of those C*-correspondences whose associated Haagerup tensor product functors admit left adjoints.
Crisp, Tyrone
core   +3 more sources

Spectral integration and spectral theory for non-Archimedean Banach spaces

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2002
Banach algebras over arbitrary complete non-Archimedean fields are considered such that operators may be nonanalytic. There are different types of Banach spaces over non-Archimedean fields.
S. Ludkovsky, B. Diarra
doaj   +1 more source

Some properties of shift operators on algebras generated by $*$-polynomials

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2018
A $*$-polynomial is a function on a complex Banach space $X,$ which is a sum of so-called $(p,q)$-polynomials. In turn, for non-negative integers $p$ and $q,$ a $(p,q)$-polynomial is a function on $X,$ which is the restriction to the diagonal of some ...
T.V. Vasylyshyn
doaj   +1 more source

The algebraic size of the family of injective operators

open access: yesOpen Mathematics, 2017
In this paper, a criterion for the existence of large linear algebras consisting, except for zero, of one-to-one operators on an infinite dimensional Banach space is provided. As a consequence, it is shown that every separable infinite dimensional Banach
Bernal-González Luis
doaj   +1 more source

When is multiplication in a Banach algebra open? [PDF]

open access: yes, 2017
We develop the theory of Banach algebras whose multiplication (regarded as a bilinear map) is open. We demonstrate that such algebras must have topological stable rank 1, however the latter condition is strictly weaker and implies only that products of ...
Draga, Szymon, Kania, Tomasz
core   +1 more source

On some properties of Banach operators

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2001
A mapping α from a normed space X into itself is called a Banach operator if there is a constant k such that 0 ...
A. B. Thaheem, AbdulRahim Khan
doaj   +1 more source

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