cproj(3) Library Functions Manual cproj(3) NAME cproj, cprojf, cprojl - project into Riemann Sphere LIBRARY Math library (libm, -lm) SYNOPSIS #include <complex.h> double complex cproj(double complex z); float complex cprojf(float complex z); long double complex cprojl(long double complex z); DESCRIPTION These functions project a point in the plane onto the surface of a Rie- mann 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. VERSIONS These functions were added in glibc 2.1. ATTRIBUTES For an explanation of the terms used in this section, see at- tributes(7). ┌────────────────────────────────────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├────────────────────────────────────────────┼───────────────┼─────────┤ │cproj(), cprojf(), cprojl() │ Thread safety │ MT-Safe │ └────────────────────────────────────────────┴───────────────┴─────────┘ STANDARDS C99, POSIX.1-2001, POSIX.1-2008. NOTES In glibc 2.11 and earlier, the implementation does something different (a stereographic projection onto a Riemann Sphere). SEE ALSO cabs(3), complex(7) Linux man-pages 6.03 2022-12-15 cproj(3)
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