Definition:Inverse Hyperbolic Cosine/Complex/Definition 1

Definition
The inverse hyperbolic cosine is a multifunction defined as:


 * $\forall z \in \C: \map {\cosh^{-1} } z := \set {w \in \C: z = \map \cosh w}$

where $\map \cosh w$ is the hyperbolic cosine function.

Also see

 * Equivalence of Definitions of Complex Inverse Hyperbolic Cosine