CSQRT(3) Linux Programmer's Manual CSQRT(3)
NAME
csqrt, csqrtf, csqrtl - complex square root
SYNOPSIS
#include <complex.h>
double complex csqrt(double complex z);
float complex csqrtf(float complex z);
long double complex csqrtl(long double complex z);
Link with -lm.
DESCRIPTION
These functions calculate the complex square root of z, with a branch
cut along the negative real axis. (That means that csqrt(-1+eps*I)
will be close to I while csqrt(-1-eps*I) will be close to -I, if eps is
a small positive real number.)
VERSIONS
These functions first appeared in glibc in version 2.1.
ATTRIBUTES
For an explanation of the terms used in this section, see at-
tributes(7).
+----------------------------+---------------+---------+
|Interface | Attribute | Value |
+----------------------------+---------------+---------+
|csqrt(), csqrtf(), csqrtl() | Thread safety | MT-Safe |
+----------------------------+---------------+---------+
CONFORMING TO
C99, POSIX.1-2001, POSIX.1-2008.
SEE ALSO
cabs(3), cexp(3), complex(7)
COLOPHON
This page is part of release 5.07 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the
latest version of this page, can be found at
https://www.kernel.org/doc/man-pages/.
2017-09-15 CSQRT(3)