CSQRT(3) complex math routines 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 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.)
CONFORMING TO C99
SEE ALSO cabs(3), cexp(3), complex(7)