fast accurate Kneser sexp algorithm

[sheldonison]

Why is this called "Kneser"? can you provide the article or reference that inspired this algorithm?

Take a look at these two posts; Henryk's post, http://math.eretrandre.org/tetrationforu...hp?tid=213
and Jay's post, http://math.eretrandre.org/tetrationforu...hp?tid=358

Kneser's Riemann mapping results in where which has been wrapped around a unit circle by using the substitution . So my approach is related, and mathematically equivalent, but not identical. In the approach used in my kneser.gp program, I iterate, generating increasingly accurate approximations from increasingly accurate sexp(z) taylor series approximations where in the limit,