N

E Chebyshev

E Collocation [2]

E Galerkin [1]

6

4.3706E-04

0.22E-02

----

8

1.0349E-05

0.43E-04

0.84E-02

10

1.1865E-07

0.44E-06

0.19E-06

14

3.8885E-12

0.12E-10

0.20E-09

16

1.2817E-14

0.38E-13

0.18E-09