Section: Linux Programmer's Manual (3)
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csqrt, csqrtf, csqrtl - complex square root
double complex csqrt(double complex z);
float complex csqrtf(float complex z);
long double complex csqrtl(long double complex z);
Link with -lm.
These functions calculate the complex square root of
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
These functions first appeared in glibc in version 2.1.
For an explanation of the terms used in this section, see
C99, POSIX.1-2001, POSIX.1-2008.
This page is part of release 4.15 of the Linux
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Time: 19:25:25 GMT, September 18, 2018