From: An efficient computer application of the sinc-Galerkin approximation for nonlinear boundary value problems
(a,b)
ϕ(z)
z k
a
b
ln( z − a b − z )
a + b e k h 1 + e k h
0
1
ln( z 1 − z )
e k h 1 + e k h
∞
ln(z)
e k h
ln(sinh(z))
ln( e k h + e 2 k h + 1 )
−∞
z
kh
sinh−1(z)