Mathematical Library Functions                          cproj(3M)



NAME
     cproj, cprojf, cprojl - complex projection functions

SYNOPSIS
     c99 [ flag... ] file... -lm [ library... ]
     #include 

     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.

ERORS
     No errors are defined.

ATRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



     
           ATRIBUTE TYPE               ATRIBUTE VALUE       
    
     Interface Stability          Standard                    
    
     MT-Level                     MT-Safe                     
    


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




SunOS 5.11          Last change: 12 Jul 2006                    1