Hypergeometric functions 5 Hypergeometric functions-- Orthogonal polynomials-- Chebyshev polynomials-- Representations of groups 3 Differential equations, Partial 2 Functional Analysis 1 Functional analysis 1 Functions of a Complex Variable 1 Functions of complex variables 1 Functions of real variables 1 Integral equation 1 Integral transform 1 Mathematics 1 Numerical solutions 1 Real Functions 1 Riemann surfaces 1 Several Complex Variables and Analytic Spaces 1 Singularities (Mathematics) 1 Special Functions 1 Special functions 1