Mathematics 16 History 9 Hamiltonian systems 7 Mathematical models 6 Mathematical physics 6 Fractals 5 Mathematical analysis 5 Numerical solutions 5 Operator theory 5 Boundary value problems 4 Differential equations, Partial 4 Linear operators 4 Probabilities 4 Spectral theory (Mathematics) 4 Symplectic manifolds 4 Wavelets (Mathematics) 4 Dynamics 3 Functions of complex variables 3 Geometry, Differential 3 Lie algebras 3 Mathematical statistics 3 Measure theory 3 Nonlinear functional analysis 3 Number theory 3 Numerical analysis 3 Set theory 3 Stochastic processes 3 Algorithms 2 Differential equations 2 Differential equations, Elliptic 2