Differential equations-- Analysis-- Mathematics 276 Mathematics 213 Number theory-- Algebra-- Mathematics 195 Functions of complex variables-- Analysis-- Mathematics 191 Analysis-- Mathematics 167 Groups-- Algebra-- Mathematics 167 Algebra-- Mathematics 141 Functional analysis-- Mathematics 139 Linear, multilinear, multidimensional, vector algebras-- Mathematics 131 Applied numerical analysis-- Applied mathematics 119 Functions of real variables-- Analysis-- Mathematics 112 Topological and related algebra and groups 106 Graph theory-- Mathematics 94 Operational calculus-- Functional analysis-- Mathematics 91 Topology-- Mathematics 91 Fourier and harmonic analysis 85 Differential -- Integral geometry-- Mathematics 84 Geometry-- Mathematics 78 Abstract algebra-- Mathematics 77 Approximations -- expansions-- Mathematics 67 Special functions-- Analysis-- Mathematics 58 Combinatorial analysis-- Mathematics 56 Determinants -- matrices-- Algebra-- Mathematics 53 Algebraic geometry 52 Measure theory-- Analysis-- Mathematics 52 General Topology-- Point set topology 51 Rings, integral domains, ideals, Modules, Radical theory-- Algebra-- Mathematics 48 Mathematical modeling 44 Probabilities-- Applied mathematics 44 Set theory-- Fuzzy sets-- Transfinite numbers 41