α

h

${\Vert u-U\Vert }_{\infty }$

Order ≈

$\Vert u-U\Vert$

Order ≈

0.3

0.6

0.9

1/5

1/10

1/20

1/40

1/5

1/10

1/20

1/40

1/5

1/10

1/20

1/40

9.9835e−04

3.0475e−04

7.9857e−05

2.0236e−05

9.9241e−04

3.0417e−04

7.9744e−05

2.0208e−05

9.9449e−04

3.0395e−04

7.9607e−05

2.0166e−05

—

1.7119

1.9321

1.9805

—

1.7061

1.9314

1.9804

—

1.7101

1.9329

1.9810

5.5526e−04

1.6940e−04

4.4341e−05

1.1211e−05

5.5209e−04

1.6909e−04

4.4281e−05

1.1197e−05

5.5319e−04

1.6897e−04

4.4207e−05

1.1175e−05

—

1.7127

1.9337

1.9837

—

1.7071

1.9330

1.9836

—

1.7110

1.9344

1.9840