clog10(3) [minix man page]

CLOG10(3)						     Linux Programmer's Manual							 CLOG10(3)

NAME
clog10, clog10f, clog10l - base-10 logarithm of a complex number SYNOPSIS
#define _GNU_SOURCE /* See feature_test_macros(7) */ #include <complex.h> double complex clog10(double complex z); float complex clog10f(float complex z); long double complex clog10l(long double complex z); Link with -lm. DESCRIPTION
The call clog10(z) is equivalent to: clog(z)/log(10) or equally: log10(cabs(c)) + I * carg(c) / log(10) The other functions perform the same task for float and long double. Note that z close to zero will cause an overflow. VERSIONS
These functions first appeared in glibc in version 2.1. ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7). +-------------------------------+---------------+---------+ |Interface | Attribute | Value | +-------------------------------+---------------+---------+ |clog10(), clog10f(), clog10l() | Thread safety | MT-Safe | +-------------------------------+---------------+---------+ CONFORMING TO
These functions are GNU extensions. The identifiers are reserved for future use in C99 and C11. SEE ALSO
cabs(3), cexp(3), clog(3), clog2(3), complex(7) COLOPHON

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

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
These functions calculate 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) - clog(1 - z)) VERSIONS
These functions first appeared in glibc in version 2.1. ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7). +-------------------------------+---------------+---------+ |Interface | Attribute | Value | +-------------------------------+---------------+---------+ |catanh(), catanhf(), catanhl() | Thread safety | MT-Safe | +-------------------------------+---------------+---------+ CONFORMING TO
C99, POSIX.1-2001, POSIX.1-2008. EXAMPLE
/* Link with "-lm" */ #include <complex.h> #include <stdlib.h> #include <unistd.h> #include <stdio.h> int main(int argc, char *argv[]) { double complex z, c, f; if (argc != 3) { fprintf(stderr, "Usage: %s <real> <imag> ", argv[0]); exit(EXIT_FAILURE); } z = atof(argv[1]) + atof(argv[2]) * I; c = catanh(z); printf("catanh() = %6.3f %6.3f*i ", creal(c), cimag(c)); f = 0.5 * (clog(1 + z) - clog(1 - z)); printf("formula = %6.3f %6.3f*i ", creal(f2), cimag(f2)); exit(EXIT_SUCCESS); } SEE ALSO
atanh(3), cabs(3), cimag(3), ctanh(3), complex(7) COLOPHON
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