Algèbres topologiques Analyse fonctionnelle Banach algebras C*-algebras C*-algèbres Convex sets in topological linear spaces; Choquet theory Difference and functional equations Functional analysis Functional equations and inequalities General nonassociative rings General theory of linear operators Genetic algebras Harmonic analysis in several variables Harmonic analysis on Euclidean spaces Nonassociative rings and algebras Nonlinear operators and their properties Numerical range, numerical radius Operator theory Other nonassociative rings and algebras Partial differential operators Selfadjoint operator algebras ($C^*$-algebras, von Neumann ($W^*$- ) algebras, etc.) Topological algebras Topological linear spaces and related structures