Orthogonal polynomials 6 Mathematics 4 Hypergeometric functions-- Orthogonal polynomials-- Chebyshev polynomials-- Representations of groups 3 Polynomials 3 Differential equations, Partial 2 Numerical solutions 2 Orthogonalization methods 2 Algebra 1 Algebraic Geometry 1 Algebraic geometry 1 Approximation theory 1 Approximations-Theory 1 Continued fractions 1 Difference equations 1 Equations 1 Field Theory and Polynomials 1 Field theory (Physics) 1 Functional Analysis 1 Functional analysis 1 Functions, Orthogonal 1 Functions, Special 1 Harmonic analysis 1 Historiography 1 Hypergeometrische orthogonale Polynome 1 Integrals 1 Interpolation 1 Iterative methods (Mathematics) 1 MATHEMATICS / General 1 Operator Theory 1 Operator theory 1