atanh() [6/11]

template<typename T , require_complex_bt< std::is_arithmetic, T > * = nullptr>

auto stan::math::atanh ( const T  x )

inline

Return the inverse hyperbolic tangent of the specified value.

An argument of -1 returns negative infinity and an argument of 1 returns infinity. Returns nan for nan argument.

Parameters

[in]

x

complex<Arithmetic> Argument.

Returns

Inverse hyperbolic tangent of the argument.

Exceptions

std::domain_error

If argument is not in [-1, 1].

Definition at line 48 of file atanh.hpp.