Variational numerical method for PDE: weak form a(u,v) = L(v) discretised on a finite-dim subspace V_h of piecewise-polynomial functions on a mesh. Optimal approximation under Galerkin orthogonality.
Variational numerical method for PDE: weak form a(u,v) = L(v) discretised on a finite-dim subspace V_h of piecewise-polynomial functions on a mesh. Optimal approximation under Galerkin orthogonality.