Name

catanh, catanhf, catanhl — complex arc tangents hyperbolic

Synopsis

#include <complex.h>
double complex catanh( double complex   z);
float complex catanhf( float complex   z);
long double complex catanhl( long double complex   z);

Link with −lm.
  

DESCRIPTION

The catanh() function calculates the complex atanh(). If y = catanh(z), then z = ctanh(y). The imaginary part of y is chosen in the interval [−pi/2,pi/2].

One has catanh(z) = 0.5 * clog((1 + z) / (1 − z)).

CONFORMING TO

C99

SEE ALSO

atanh(3), cabs(3), cimag(3), complex(7)


  Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
Distributed under GPL