GNU/Linux man pages
Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :
GNU/Linux |
Debian 6.0.5(Squeeze) |
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catanh(3) |
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catanh, catanhf, catanhl − complex arc tangents hyperbolic
#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.
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))
These functions first appeared in glibc in version 2.1.
C99.
atanh(3), cabs(3), cimag(3), complex(7)
This page is part of release 3.27 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/.
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catanh(3) | |