Charakterisierungen einiger Funktionenalgebren.
Commutative Banach Algebras and Decomposable Operators.
Commutativity criterions in locally m-convex algebras.
In this paper we define the notions of semicommutativity and semicommutativity modulo a linear subspace. We prove some results regarding the semicommutativity or semicommutativity modulo a linear subspace of a sequentially complete m-convex algebra. We show how such results can be applied in order to obtain commutativity criterions for locally m-convex algebras.
Compact Groups Operating on Banach Algebras.
Compactness of derivations from commutative Banach algebras
We consider the compactness of derivations from commutative Banach algebras into their dual modules. We show that if there are no compact derivations from a commutative Banach algebra, A, into its dual module, then there are no compact derivations from A into any symmetric A-bimodule; we also prove analogous results for weakly compact derivations and for bounded derivations of finite rank. We then characterise the compact derivations from the convolution algebra ℓ¹(ℤ₊) to its dual. Finally, we give...
Continuité des caractères des algèbres localement multiplicativement convexes
Continuity of derivations from radical convolution algebras