Mathematical models 5 Mathematics 5 Differential operators 3 Lie groups 3 Quantum field theory 3 Celestial mechanics 2 Differential invariants 2 General relativity (Physics) 2 Lie algebras 2 Markov processes 2 Options (Finance) 2 Quantum groups 2 Stochastic approximation 2 Superalgebras 2 Arithmetic 1 Astrometry 1 Boundary value problems 1 Business mathematics 1 Calculus of tensors 1 Climatic changes 1 Compact groups 1 Continuum mechanics 1 Differential equations, Elliptic 1 Differential equations, Nonlinear 1 Differential equations, Partial 1 Dirac equation 1 Dynamics 1 Dynamics, Rigid 1 Elastic plates and shells 1 Electromagnetic fields 1