Differential equations, Elliptic Numerical solutions 6 Boundary value problems 4 Differential equations, Parabolic 3 Finite element method 2 MATHEMATICS / General 2 Approximation theory 1 Asymptotic theory 1 Bifurcation theory 1 Combustion theory 1 Differential equations, Nonlinear 1 Inequalities (Mathematics) 1 Mathematical physics 1 Minimal surfaces (Geometry) 1 Phase transition theory 1