std::atanh(std::complex)
From cppreference.com
                    
                                        
                    
                    
                                                            
                    |   Defined in header  
<complex>
  | 
||
|   template< class T >  
complex<T> atanh( const complex<T>& z );  | 
(since C++11) | |
Computes complex arc hyperbolic tangent of a complex value z. 
[edit] Parameters
| z | - | complex value | 
[edit] Return value
Complex arc hyperbolic tangent of z
[edit] See also
|    computes tangent of a complex number (tan(z))    (function template)  | 
|
|    computes hyperbolic tangent of a complex number   (function template)  | 
|
|    (C++11) 
 | 
   computes arc tangent of a complex number (arctan(z))  (function template)  |