Inverse hyperbolic tangent: Representations through equivalent functions (subsection 27/02/12/03/16)

ArcTanh

$Mathematica Notation$

Involving tanh^-1(1/z^1/2) and sech^-1((2(1-z)^1/2/((1-z)^1/2-(-z)^1/2))^1/2) (4 formulas)