Mathematics 27 Differential equations, Partial 15 Mathematical analysis 13 Lie groups 10 Mathematical models 10 Representations of groups 10 Geometry, Differential 9 Differentiable dynamical systems 8 Differential equations 6 Functional analysis 6 Geometry, Algebraic 6 Linear algebraic groups 6 Operator algebras 6 Algebraic topology 5 Approximation theory 5 Ergodic theory 5 Homology theory 5 Representations of algebras 5 Spectral theory (Mathematics) 5 Algebra 4 Asymptotic theory 4 Attractors (Mathematics) 4 Bifurcation theory 4 Boundary value problems 4 Differential equations, Elliptic 4 Differential equations, Nonlinear 4 Hamiltonian systems 4 Invariants 4 Lie algebras 4 Low-dimensional topology 4