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   cproj    ( 3 )

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Имя (Name)

cproj, cprojf, cprojl - project into Riemann Sphere

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Синопсис (Synopsis)

#include <complex.h>

       double complex cproj(double complex z);
       float complex cprojf(float complex z);
       long double complex cprojl(long double complex z);

       Link with -lm.

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Описание (Description)

These functions project a point in the plane onto the surface of
       a Riemann Sphere, the one-point compactification of the complex
       plane.  Each finite point z projects to z itself.  Every complex
       infinite value is projected to a single infinite value, namely to
       positive infinity on the real axis.

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Версии (Versions)

These functions first appeared in glibc in version 2.1.

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Атрибуты (Attributes)

For an explanation of the terms used in this section, see
       attributes(7).

       ┌──────────────────────────────────────┬───────────────┬─────────┐
       │Interface                             │ Attribute     │ Value   │
       ├──────────────────────────────────────┼───────────────┼─────────┤
       │cproj(), cprojf(), cprojl()           │ Thread safety │ MT-Safe │
       └──────────────────────────────────────┴───────────────┴─────────┘

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Стандарты (Conforming to)

C99, POSIX.1-2001, POSIX.1-2008.

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Примечание (Note)

In glibc 2.11 and earlier, the implementation does something
       different (a stereographic projection onto a Riemann Sphere).

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Смотри также (See also)

cabs(3), complex(7)

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