From: Twelfth degree spline with application to quadrature
Step size h
Our method
Method in Anwar and El-Tarazi (1989)
0.1
0
3.3e−005
0.05
2.1e−006
0.025
1.3e−007
0.02
5.3e−008
0.0125
3.5527e−015
8.1e−009
0.01
3.3e−009