clog(3) Library Functions Manual clog(3) NAME clog, clogf, clogl - natural logarithm of a complex number LIBRARY Math library (libm, -lm) SYNOPSIS #include <complex.h> double complex clog(double complex z); float complex clogf(float complex z); long double complex clogl(long double complex z); DESCRIPTION These functions calculate the complex natural logarithm of z, with a branch cut along the negative real axis. The logarithm clog() is the inverse function of the exponential cexp(3). Thus, if y = clog(z), then z = cexp(y). The imaginary part of y is chosen in the interval [-pi,pi]. One has: clog(z) = log(cabs(z)) + I * carg(z) Note that z close to zero will cause an overflow. VERSIONS These functions were added in glibc 2.1. ATTRIBUTES For an explanation of the terms used in this section, see at- tributes(7). ┌────────────────────────────────────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├────────────────────────────────────────────┼───────────────┼─────────┤ │clog(), clogf(), clogl() │ Thread safety │ MT-Safe │ └────────────────────────────────────────────┴───────────────┴─────────┘ STANDARDS C99, POSIX.1-2001, POSIX.1-2008. SEE ALSO cabs(3), cexp(3), clog10(3), clog2(3), complex(7) Linux man-pages 6.03 2022-12-15 clog(3)
Generated by dwww version 1.15 on Fri Jun 28 08:09:08 CEST 2024.