Functions of complex variables Functions of a Complex Variable 34 Mathematics 34 Functional Analysis 8 Functional analysis 8 Differential equations, partial 7 Several Complex Variables and Analytic Spaces 6 more ... Operator Theory 5 Operator theory 5 Analysis 4 Difference and Functional Equations 4 Functional equations 4 Global analysis (Mathematics) 4 Partial Differential Equations 4 Theoretical, Mathematical and Computational Physics 4 Approximations and Expansions 3 Calculus of Variations and Optimal Control, Optimization 3 Differentiable dynamical systems 3 Differential Geometry 3 Dynamical Systems and Ergodic Theory 3 Functions, special 3 Global differential geometry 3 Group Theory and Generalizations 3 Group theory 3 Linear and Multilinear Algebras, Matrix Theory 3 Matrix theory 3 Number Theory 3 Number theory 3 Ordinary Differential Equations 3 Special Functions 3 less ...