Asymptotic theory Differential equations 17 Differential equations, Partial 4 Perturbation (Mathematics) 4 Asymptotic expansions 3 Differential equations, Linear 3 Integral equations 3 Approximation theory 2 Differential equations, Nonlinear 2 Econometrics 2 Hydrodynamics 2 Mathematical statistics 2 Ships 2 Stability 2 Water waves 2 Bayesian statistical decision theory 1 Bifurcation theory 1 Boundary value problems 1 Differentiable dynamical systems 1 Differential equations, Parabolic 1 Dimensional analysis 1 Elasticity 1 Fokker-Planck equation 1 Homology theory 1 Initial value problems 1 Mathematical models 1 Mathematical physics 1 Noise 1 Nonparametric statistics 1 Numerical solutions 1