|| Linux Programmer's Manual
NAME csqrt, csqrtf, csqrtl - complex square root
double complex csqrt(double complex
float complex csqrtf(float complex
long double complex csqrtl(long double complex
DESCRIPTION Calculate the square root of a given complex number, with nonnegative real part, and 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.
CONFORMING TO C99.
COLOPHON This page is part of release 3.53 of the Linux
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