m × m | \(\|\boldsymbol{p}^{n}-\boldsymbol{P}^{n}_{h}\|_{0}\) | Order | \(\|\boldsymbol{\Pi }_{h}\boldsymbol{p}^{n}-\boldsymbol{P}^{n}_{h}\|_{0}\) | Order |
---|---|---|---|---|
20 × 20 | 0.0185 | – | 0.8402 × 10−3 | – |
40 × 40 | 0.0092 | 0.9998 | 0.2103 × 10−3 | 1.9980 |
80 × 80 | 0.0046 | 0.9999 | 0.0526 × 10−3 | 1.9995 |