3 papers
math.FA2018
Some Character Generating Functions on Banach Algebras
R. Brits, F. Schulz, C. Toure
We consider a multiplicative variation on the classical Kowalski-Słodkowski Theorem which identifies the characters among the collection of all functionals on a Banach algebra .…
math.FA2018
A Spectral Characterization of Isomorphisms on -Algebras
Rudi Brits, Francois Schulz, Cheick Toure
Following a result of Hatori, Miura and Tagaki ([4]) we give here a spectral characterization of an isomorphism from a -algebra onto a Banach algebra. We then use this res…
math.FA2018
Truncation and Spectral Variation in Banach Algebras
Rudi Brits, Francois Schulz, Cheick Toure
Let and be elements of a semisimple, complex and unital Banach algebra . Using subharmonic methods, we show that if the spectral containment holds…