Numerical solutions Differential equations 35 Differential equations, Partial 23 Boundary value problems 21 Equations 14 Congresses 13 Integral equations 12 Data processing 9 Difference equations 9 Differential equations, Nonlinear 7 Finite element method 7 Approximation theory 6 Differential equations, Elliptic 6 Asymptotic expansions 5 Numerical analysis 5 Functional analysis 4 Initial value problems 4 Mathematical physics 4 Mathematics 4 Perturbation (Mathematics) 4 Asymptotic theory 3 Fluid dynamics 3 Invariant imbedding 3 Iterative methods (Mathematics) 3 Programming (Mathematics) 3 Bifurcation theory 2 Calculus of variations 2 Differential equations, Linear 2 Elasticity 2 Electromagnetism 2