Fig. 6
From: Multilevel preconditioners for embedded enriched partition of unity approximations
Sketch of the blended function discretization space depicting the supports of a basis function \(\phi _{\mathrm {HOST}} \in V_{\mathrm {HOST}}\) (light gray) and \(\phi _{\mathrm {ENR}} \in V_{\mathrm {ENR}}\) (dark gray). The support sizes are of comparable size throughout the paper; i.e. \({\text {diam}}({\text {supp}}(\phi _{\mathrm {HOST}})\sim {\text {diam}}({\text {supp}}(\phi _{\mathrm {ENR}})\)