Congresses 21 Rings (Algebra) 5 Banach spaces 4 Data processing 4 Banach algebras 3 Control theory 3 Differential games 3 Functional analysis 3 Functions of complex variables 3 Modules (Algebra) 3 Topology 3 Algebra 2 Boundary value problems 2 Categories (Mathematics) 2 Combinatorial designs and configurations 2 Commutative rings 2 Dimension theory (Algebra) 2 Functions, Continuous 2 Geometry, Differential 2 Harmonic analysis 2 Metric spaces 2 Nonlinear functional analysis 2 Numerical solutions 2 Representations of algebras 2 Approximation theory 1 Biomathematics 1 Brauer group 1 Compact Abelian groups 1 Convex domains 1 Decomposition (Mathematics) 1