Mathematics 23 Quantum theory 16 Calculus 13 Geometry 13 Philosophy 13 Functional analysis 11 History 11 Matrices 10 Numerical analysis 9 Differential equations 8 Differential equations, Partial 8 Group theory 8 Logic, Symbolic and mathematical 8 Mathematical physics 8 Topology 8 Algebras, Linear 7 Folklore 7 Functions 7 Mathematical recreations 7 Mathematics, Greek 7 Topology-- Mathematics 7 Calculus of tensors 6 Chemistry 6 Mathematical analysis 6 Shakespeare 6 Vector analysis 6 Algebra 5 Calculus of variations 5 Floriculture 5 Functions of complex variables 5