Algebra Algèbres d'opérateurs K-theory K-théorie MATHEMATICS Operator algebras $K$-theory $K$-theory and operator algebras Algebra, Homological Algèbre homologique C*-algebras C*-algèbres Classifications of $C^*$-algebras Functional analysis General theory of $C^*$-algebras General theory of von Neumann algebras Index theory Intermediate Lie groups Linear Noncommutative differential geometry Noncommutative dynamical systems Representations of Lie and linear algebraic groups over real fields: analytic methods Selfadjoint operator algebras ($C^*$-algebras, von Neumann ($W^*$- ) algebras, etc.) Topological groups, Lie groups