From: Convergence analysis and parity conservation of a new form of a quadratic explicit spline with applications to integral equations
n
5
10
15
20
50
en(S)
1.6 ·10−2
6.4 ·10−4
8.7 ·10−5
2.3 ·10−5
3.7 ·10−7
ET
8. ·10−2
1. ·10−2
3. ·10−3
1. ·10−3
1. ·10−4