Wyniki wyszukiwania - BazTech

Ograniczanie wyników

4 Demonstratio Mathematica

Znaleziono wyników: 4

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

The strict topology on topological algebras

Khan L., Mohammad N., Thaheem A.

Demonstratio Mathematica

2005

Vol. 38, nr 4

883--894

In this paper, we define strict, uniform and compact-open topologies on a topological algebra and investigate their properties. These results unify and include several results of other authors.

On (α, β)-derivations of semiprime rings, II

Chaudhry M., Thaheem A.

Demonstratio Mathematica

2004

Vol. 37, nr 4

793--802

Centralizing mappings and derivations on semiprime rings

Chaudhry M., Thaheem A.

Demonstratio Mathematica

2004

Vol. 37, nr 2

285--292

In this paper we study some properties of centralizing mappings on semi-prime rings. The main purpose is to prove the result: Let -R be a semiprime ring and f an endomorphism of R, g an epimorphism of R such that the mapping x -> [f(x),g(x)] is central. Then [f(x),g(x)] = 0 holds for all x e R. We also establish some results about (alpha,beta)-derivations.

A note on (alpha)-derivations on semiprime rings

Thaheem A., Samman M.

Demonstratio Mathematica

2001

Vol. 34, nr 4

783-788

In this note we investigate some properties of a-derivations on prime and semiprime rings. We establish some identities for a commuting a-derivation d on a semiprime ring R and show that d maps R into its center and obtain some well-known results as a consequence. We also generalize Posner's theorem on the composition of derivations for a-derivations and as an application resolve a functional equation of automorphisms on certain prime rings.