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| author | Alejandro Colomar <alx.manpages@gmail.com> | 2022-09-09 14:15:08 +0200 |
|---|---|---|
| committer | Alejandro Colomar <alx.manpages@gmail.com> | 2022-09-09 14:15:08 +0200 |
| commit | 96e72ec1fbadd13cbcbc2b263540e4f5e9e09d7c (patch) | |
| tree | 70686b943e33a6e939ad265acb7ddfef70b91f32 /man3/clog.3 | |
| parent | 8f4ed6463206e8ede815c72085c7305dafc2e4fc (diff) | |
| download | man-pages-96e72ec1fbadd13cbcbc2b263540e4f5e9e09d7c.tar.gz | |
Revert "src.mk, All pages: Move man* to man/"
This reverts commit 70ac1c4785fc1e158ab2349a962dba2526bf4fbc.
Link: <https://lore.kernel.org/linux-man/YxcV4h+Xn7cd6+q2@pevik/T/>
Reported-by: Petr Vorel <pvorel@suse.cz>
Reported-by: Jakub Wilk <jwilk@jwilk.net>
Cc: Stefan Puiu <stefan.puiu@gmail.com>
Signed-off-by: Alex Colomar <alx.manpages@gmail.com>
Diffstat (limited to 'man3/clog.3')
| -rw-r--r-- | man3/clog.3 | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/man3/clog.3 b/man3/clog.3 new file mode 100644 index 0000000000..6b1cf559e3 --- /dev/null +++ b/man3/clog.3 @@ -0,0 +1,72 @@ +.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de) +.\" +.\" SPDX-License-Identifier: GPL-1.0-or-later +.\" +.TH CLOG 3 2021-03-22 "Linux man-pages (unreleased)" +.SH NAME +clog, clogf, clogl \- natural logarithm of a complex number +.SH LIBRARY +Math library +.RI ( libm ", " \-lm ) +.SH SYNOPSIS +.nf +.B #include <complex.h> +.PP +.BI "double complex clog(double complex " z ); +.BI "float complex clogf(float complex " z ); +.BI "long double complex clogl(long double complex " z ); +.fi +.SH DESCRIPTION +These functions calculate the complex natural logarithm of +.IR z , +with a branch cut along the negative real axis. +.PP +The logarithm +.BR clog () +is the inverse function of the exponential +.BR cexp (3). +Thus, if \fIy\ =\ clog(z)\fP, then \fIz\ =\ cexp(y)\fP. +The imaginary part of +.I y +is chosen in the interval [\-pi,pi]. +.PP +One has: +.PP +.in +4n +.EX +clog(z) = log(cabs(z)) + I * carg(z) +.EE +.in +.PP +Note that +.I z +close to zero will cause an overflow. +.SH VERSIONS +These functions first appeared in glibc in version 2.1. +.SH ATTRIBUTES +For an explanation of the terms used in this section, see +.BR attributes (7). +.ad l +.nh +.TS +allbox; +lbx lb lb +l l l. +Interface Attribute Value +T{ +.BR clog (), +.BR clogf (), +.BR clogl () +T} Thread safety MT-Safe +.TE +.hy +.ad +.sp 1 +.SH STANDARDS +C99, POSIX.1-2001, POSIX.1-2008. +.SH SEE ALSO +.BR cabs (3), +.BR cexp (3), +.BR clog10 (3), +.BR clog2 (3), +.BR complex (7) |