h

$\alpha =1.1$

$\alpha =1.5$

$\alpha =1.9$

${\Vert e\Vert }_{L_2}$

order

${\Vert e\Vert }_{L_2}$

order

${\Vert e\Vert }_{L_2}$

order

1/36

2.1326e−08

3.2209e−07

6.2337e−06

1/49

8.5892e−09

2.9498

1.3111e−07

2.9153

2.5147e−06

2.9445

1/64

3.9019e−09

2.9545

5.9863e−08

2.9355

1.1400e−06

2.9623

1/81

1.9449e−09

2.9557

2.9892e−08

2.9480

5.6603e−07

2.9721

1/100

1.0433e−09

2.9557

1.6033e−08

2.9562

3.0221e−07

2.9779