5 papers
Riesz endomorphisms of Banach algebras
Joel F. Feinstein, Herbert Kamowitz
Let B be a unital commutative semi-simple Banach algebra. We study endomorphisms of B which are simultaneously Riesz operators. Clearly compact and power compact endomorphisms are…
Compact homomorphisms between Dales-Davie algebras
J. F. Feinstein, H. Kamowitz
In this note we consider compact homomorphisms and endomorphisms between various Dales-Davie algebras. In particular, we obtain fairly complete results when the underlying set is t…
Compact endomorphisms of Banach algebras of infinitely differentiable functions
J. F. Feinstein, H. Kamowitz
We consider non-zero endomorphisms of the Dales and Davie algebras of infinitely differentiable functions on intervals in the real line. We discuss necessary and sufficient conditi…
Endomorphisms of Banach algebras of infinitely differentiable functions on compact plane sets
J. F. Feinstein, Herbert Kamowitz
In this note we study the endomorphisms of certain Banach algebras of infinitely differentiable functions on compact plane sets, associated with weight sequences M. These algebras…
Compact endomorphisms of H infinity of D
J. F. Feinstein, Herbert Kamowitz
When G is a region in the complex plane, compact composition operators on the uniform algebra of bounded analytic functions on G and the spectra of these operators were described b…