Approximation by other special function classes Approximation by rational functions Approximation in the complex domain Approximation theory Approximations and expansions Asymptotic representations in the complex domain Fonctions d'une variable complexe Fourier series in special orthogonal functions (Legendre polynomials, Walsh functions, etc.) Functions of a complex variable Functions of complex variables Harmonic analysis on Euclidean spaces Miscellaneous topics of analysis in the complex domain Moment problems, interpolation problems Nontrigonometric harmonic analysis Orthogonal functions and polynomials, general theory Orthogonal polynomials Padé; approximation Polynômes orthogonaux Rate of convergence, degree of approximation Special functions (33-XX deals with the properties of functions as functions) Théorie de l'approximation