$\tau$

error(a)

error(b)

rate(a)

rate(b)

1/10

6.5328e−05

7.1457e−06

——

——

1/20

3.2639e−05

1.6780e−06

1.0011

2.0903

1/40

1.6311e−05

3.9876e−07

1.0001

2.0732

1/80

8.1575e−06

8.9321e−08

0.9996

2.1584

1/160

4.0836e−06

1.3228e−08

0.9983

2.7554