mesh

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

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

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

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

h

5.93620E-1

6.20480E-1

h/2

2.45574E-1

2.41727

2.58075E-1

2.40426

h/4

8.78220E-2

2.79628

9.23020E-2

2.79597

h/8

2.26990E-2

3.86890

2.60230E-2

3.54698