Fig. 9From: Convergence study of the h-adaptive PUM and the hp-adaptive FEM applied to eigenvalue problems in quantum mechanics h -adaptive mesh refinement and shape functions associated with the central node on the domain \([0,1]^2\) for the standard and enriched element. a Mesh. b Bilinear. c Bilinear enriched with \(\exp (-\left|\mathbf{x } \right|)\) Back to article page