Functional analysis Banach spaces 8 Geometry 8 Mathematics 6 Operator theory 5 Differential equations, Partial 3 Distribution (Probability theory) 3 Mathematical analysis 3 Mathematical optimization 3 Approximation theory 2 Combinatorics 2 Evolution equations 2 Functions of complex variables 2 Integral representations 2 Linear operators 2 Numerical analysis 2 Potential theory (Mathematics) 2 Topology 2 Algebra 1 Algebra, Homological 1 Algebraic topology 1 Brownian motion processes 1 Categories (Mathematics) 1 Conformal mapping 1 Convergence 1 Convex domains 1 Convex functions 1 Convex sets 1 Differential equations, partial 1 Diffusion processes 1