 "fig:"){width="\linewidth"}  [0.0]{} ![\[fig:OlavGrid\_new\] Coarse grid features for the internal block of a regular 0$\times$0 partition: (a) primal grid and coarse nodes ((0,0) circle (.0ex);); (b) support boundary ((0,0) rectangle (0ex, 0ex);); and edge ((0,0) rectangle (0ex, 0ex);) cells; and (c) basis function.](./OlavCoarseGrid_new_