DoubleFloatElementaryFunctions

special2.spad line 1134 [edit on github]

This package implements functions which we can not directly take from underlying system.

atanh : Complex(DoubleFloat) -> Complex(DoubleFloat)

atanh(x) computes atanh.

log_plus_1 : DoubleFloat -> DoubleFloat

log_plus_1(x) computes log(1 + x) with good accuracy.