mesh

${\Vert u-u_h\Vert }_{L^2\left({\Omega }_1\right)}$

ratio $\left(L^2\left({\text{Ω}}_1\right)\right)$

${\Vert u-u_h\Vert }_{L^{\infty }\left({\Omega }_1\right)}$

ratio $\left(L^{\infty }\left({\Omega }_1\right)\right)$

h

3.58174E-1

8.76106E-1

h/2

1.30051E-1

2.75411

3.75232E-1

2.33484

h/4

4.44990E-2

2.92254

1.50271E-1

2.49704

h/8

1.46775E-2

3.03180

4.12880E-2

3.63954