Group theory Mathematics 21 Chemistry 12 Molecular theory 12 Symmetry (Physics) 12 Physics 9 Quantum theory 8 Algebra 7 Mathematical physics 5 Finite groups 4 Molecular structure 4 Algebra, Homological 3 Chemical structure 3 Lie groups 3 Particle range (Nuclear physics) 3 Quantum mechanics 3 Symmetry 3 Tensors 3 Algebraic topology 2 Calculus of tensors 2 Chemical bonds 2 Chemistry, Physical and theoretical 2 Cohomology operations 2 Combinatorial analysis 2 Commutative rings 2 Crystallography, Mathematical 2 Gruppentheorie 2 Molecular spectroscopy 2 Molecules 2 Numerical analysis 2