Physics 9 Calculus 6 Chemistry, Analytic 6 Biochemistry 5 Chemistry, Organic 5 Mathematics 5 Organic compounds 5 Chemistry, Inorganic 4 Differential equations 4 Spectrum analysis 4 Algebra, Abstract 3 Boundary value problems 3 Chemistry 3 Data processing 3 Mathematical physics 3 Mathematical statistics 3 Measure theory 3 Quantitative 3 Spectra 3 Chemistry, organic 2 Engineering mathematics 2 Integrals, Generalized 2 Nuclear physics 2 Numerical analysis 2 Probabilities 2 Problems, exercises, etc 2 Solid state chemistry 2 Solid state physics 2 Structure 2 Textbooks 2