Numerical solutions 73 Differential equations 35 Equations 14 Integral equations 12 Difference equations 9 Congresses 6 Data processing 6 Asymptotic expansions 5 Boundary value problems 4 Functional analysis 4 Approximation theory 3 Asymptotic theory 3 Mathematical physics 3 Numerical analysis 3 Perturbation (Mathematics) 3 Electromagnetism 2 Finite element method 2 Fluid dynamics 2 Fluid mechanics 2 Initial value problems 2 Integro-differential equations 2 Invariant imbedding 2 Mathematical analysis 2 Mathematical models 2 Mathematics 2 Matrices 2 Moments method (Statistics) 2 Programming (Mathematics) 2 Singular perturbations (Mathematics) 2 Acoustic surface waves 1