FK-espaces contenant c0 en analyse non-archimédienne.
Fredholm multipliers of semisimple commutative Banach algebras.
In some recent papers ([1],[2],[3],[4]) we have investigated some general spectral properties of a multiplier defined on a commutative semi-simple Banach algebra. In this paper we expose some aspects concerning the Fredholm theory of multipliers.
From finite- to infinite-dimensional phenomena in geometric functional analysis on local and asymptotic levels.
Functional models and asymptotically orthonormal sequences
Suppose is the Hardy space of the unit disc in the complex plane, while is an inner function. We give conditions for a sequence of normalized reproducing kernels in the model space to be asymptotically close to an orthonormal sequence. The completeness problem is also investigated.