Functions Approximation theory 7 Mathematics 6 Algebra 5 Set theory 5 Riemann surfaces 4 Congresses 3 Data processing 3 Graphic methods 3 Mathematical physics 3 Topology 3 Boundary value problems 2 Cardinal Numbers 2 Elliptic functions 2 Functional analysis 2 Geometry, Analytic 2 Logic, Symbolic and mathematical 2 Numerical analysis 2 Problems, exercises, etc 2 Tables 2 Asymptotic expansions 1 Calculus 1 Calculus of variations 1 Chemistry 1 Computer algorithms 1 Conformal mapping 1 Differential equations, Linear 1 Equations 1 Evaluation 1 Functions, Special 1