A general separation theorem for mappings, saddle-points duality and conjugate functions
A survey on the Szlenk index and some of its applications.
We describe how the Szlenk index has been used in various areas of the geometry of Banach spaces. We cover the following domains of application of this notion: non existence of universal spaces, linear classification of C(K) spaces, descriptive set theory, renorming problems and non linear classification of Banach spaces.
An introduction to polynomials on Banach spaces.
Analytic functions in topological vector-spaces
Approximation des fonctions analytiques avec croissance
Approximation par des variétés algébriques dans les espaces hilbertiens (Variation sur un thème de Vituškin)
Approximation Properties of the Mn-Operators.
Approximation Properties of the Mn-Operators. (Short Communication).