Extrapolation Algorithm for Computing Multiple Cauchy Principal Value Integrals

Table 6

A posterior error of the rectangle rule with .

16
32	−4.9369e − 02
64	−2.9111e − 02	−2.9508e − 03
128	−1.5820e − 02	−8.4299e − 04	−6.0160e − 05
256	−8.2468e − 03	−2.2463e − 04	−7.9308e − 06	−2.1910e − 07
512	−4.2103e − 03	−5.7922e − 05	−1.0090e − 06	−9.4039e − 09
1024	−2.1272e − 03	−1.4703e − 05	−1.2689e − 07	−4.1034e − 10