NAME | SYNOPSIS | DESCRIPTION | VERSIONS | ATTRIBUTES | CONFORMING TO | SEE ALSO | COLOPHON

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

NAME         top

       csqrt, csqrtf, csqrtl - complex square root

SYNOPSIS         top

       #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         top

       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         top

       These functions first appeared in glibc in version 2.1.

ATTRIBUTES         top

       For an explanation of the terms used in this section, see
       attributes(7).

       ┌────────────────────────────┬───────────────┬─────────┐
       │Interface                   Attribute     Value   │
       ├────────────────────────────┼───────────────┼─────────┤
       │csqrt(), csqrtf(), csqrtl() │ Thread safety │ MT-Safe │
       └────────────────────────────┴───────────────┴─────────┘

CONFORMING TO         top

       C99, POSIX.1-2001, POSIX.1-2008.

SEE ALSO         top

       cabs(3), cexp(3), complex(7)

COLOPHON         top

       This page is part of release 4.08 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/.

                                 2015-04-19                         CSQRT(3)