Differential equations, Partial Numerical solutions 22 Differential equations 16 Differential equations, Nonlinear 7 Bifurcation theory 5 Calculus of variations 4 Mathematical analysis 4 Mathematical optimization 4 Pseudodifferential operators 4 Asymptotic theory 3 Boundary value problems 3 Differential operators 3 Functional analysis 3 Initial value problems 3 Integral equations 3 Mathematics 3 Nonlinear operators 3 Partial differential operators 3 Semigroups of operators 3 Singular perturbations (Mathematics) 3 Singularities (Mathematics) 3 Attractors (Mathematics) 2 Differentiable dynamical systems 2 Differential equations, Elliptic 2 Differential equations, Parabolic 2 Eigenvalues 2 Finite differences 2 Fluid dynamics 2 Geometry 2 Harmonic analysis 2