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

2.44592E-1

7.47451E-1

h/2

9.79710E-2

2.49660

3.45129E-1

2.165713

h/4

3.55530E-2

2.75559

1.48746E-1

2.320254

h/8

1.18910E-2

2.98991

4.12630E-2

3.604833