Differential equations, Partial Numerical solutions 40 Differential equations, Nonlinear 16 Differential equations, Elliptic 15 Boundary value problems 13 Mathematical physics 12 Differential equations 11 more ... Harmonic analysis 11 Congresses 10 Asymptotic theory 9 Inverse problems (Differential equations) 9 Differential equations, Parabolic 8 Finite element method 8 Mathematical models 8 Mathematical analysis 7 Functional analysis 6 Improperly posed problems 6 Decomposition method 5 Differentiable dynamical systems 5 Finite differences 5 Fluid dynamics 5 Functions of several complex variables 5 Geometry, Differential 5 Mathematics 5 Numerical analysis 5 Partielle Differentialgleichung 5 Calculus of variations 4 Differential equations, Linear 4 Fourier series 4 Hilbert space 4 less ...