Functional analysis Congresses 10 Approximation theory 9 Numerical analysis 6 Mathematical optimization 5 Numerical solutions 4 Calculus, Operational 3 Differential equations 3 Differential equations, Partial 3 Equations 3 Functions of real variables 3 Hilbert space 3 Linear topological spaces 3 Mathematical analysis 3 Operator theory 3 System analysis 3 Algebras, Linear 2 Analytic functions 2 Banach spaces 2 Calculus 2 Calculus of operations 2 Control theory 2 Function spaces 2 Functions 2 Functions of complex variables 2 Integrals, Generalized 2 Mathematical physics 2 Measure theory 2 Nonlinear programming 2 Nonlinear theories 2