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
   attributes(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 4.09 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)

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