NAME | SYNOPSIS | DESCRIPTION | VERSIONS | CONFORMING TO | SEE ALSO | COLOPHON

The Linux Programming Interface

CATANH(3)                     Linux Programmer's Manual                     CATANH(3)

NAME         top

       catanh, catanhf, catanhl - complex arc tangents hyperbolic

SYNOPSIS         top

       #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         top

       The catanh() function calculates the complex arc hyperbolic tangent of z.  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))

VERSIONS         top

       These functions first appeared in glibc in version 2.1.

CONFORMING TO         top

       C99.

SEE ALSO         top

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

COLOPHON         top

       This page is part of release 3.32 of the Linux man-pages project.  A
       description of the project, and information about reporting bugs, can be found
       at http://www.kernel.org/doc/man-pages/.

                                      2008-08-11                            CATANH(3)

HTML rendering created 2010-12-03 by Michael Kerrisk, author of The Linux Programming Interface