комплексный квадратный корень (complex square root)
Имя (Name)
csqrt, csqrtf, csqrtl - complex square root
Синопсис (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.
Описание (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.)
Версии (Versions)
These functions first appeared in glibc in version 2.1.
Атрибуты (Attributes)
For an explanation of the terms used in this section, see
attributes(7).
┌──────────────────────────────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├──────────────────────────────────────┼───────────────┼─────────┤
│csqrt(), csqrtf(), csqrtl() │ Thread safety │ MT-Safe │
└──────────────────────────────────────┴───────────────┴─────────┘
Стандарты (Conforming to)
C99, POSIX.1-2001, POSIX.1-2008.
Смотри также (See also)
cabs(3), cexp(3), complex(7)
