Mathematics 53 Physics 49 Quantum theory 32 Economics 13 Mathematical models 13 Nuclear physics 13 Probabilities 12 Algebra 11 Biotechnology 10 Differential equations 10 Group theory 10 History 10 Nanostructured materials 10 Nanotechnology 10 Thermodynamics 9 Mathematical analysis 8 Mathematical physics 8 Number theory 8 Stochastic processes 8 Combinatorial analysis 7 Cosmology 7 Functions of complex variables 7 Geometry 7 Matrices 7 Solid state physics 7 Statistical mechanics 7 Topology 7 Chemistry 6 Geometry, Algebraic 6 Mechanics 6