Content-type: text/html Man page of cproj

cproj

Section: Mathematical Library Functions (3M)
Updated: 12 Jul 2006
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NAME

cproj, cprojf, cprojl - complex projection functions  

SYNOPSIS

c99 [ flag... ] file... -lm [ library... ]
#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 compute a projection of z onto the Riemann sphere: z projects to z, except that all complex infinities (even those with one infinite part and one NaN part) project to positive infinity on the real axis. If z has an infinite part, then cproj(z) is equivalent to:

INFINITY + I * copysign(0.0, cimag(z))

 

RETURN VALUES

These functions return the value of the projection onto the Riemann sphere.  

ERRORS

No errors are defined.  

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPEATTRIBUTE VALUE
Interface StabilityStandard
MT-LevelMT-Safe

 

SEE ALSO

carg(3M), cimag(3M), complex.h(3HEAD), conj(3M), creal(3M), attributes(5), standards(5)


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUES
ERRORS
ATTRIBUTES
SEE ALSO

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