hpux man page for catan

catan(3M)																 catan(3M)

NAME
       catan(), catanf(), catanl(), catanw(), catanq()	- complex arctangent functions

SYNOPSIS
DESCRIPTION
       These functions are available only for Integrity servers.

       returns	the  complex  arctangent  of  z,  in  the  range  of a strip mathematically unbounded along the imaginary axis and in the interval
       [-Pi/2,+Pi/2] along the real axis.  Branch cuts are outside the interval [-1,+1] along the imaginary axis.

       is a version of it takes a argument and returns a result.

       is a version of it takes a argument and returns a result.

       is an version of it takes an argument and returns an result.

       is equivalent to on HP-UX systems.

USAGE
       To use these functions, compile with the default option.  To use compile with the option.  Make sure your program includes Link in the math
       library by specifying on the compiler or linker command line.

RETURN VALUE
       = and is odd.

       returns +0+i0.

       returns +NaN+i0.

       returns +0+iInf and raises the divide-by-zero floating-point exception.

       returns Pi/2+i0, for finite positive-signed y.

       returns NaN+iNaN and optionally raises the invalid floating-point exception, for nonzero finite y.

       returns Pi/2+i0, for finite positive-signed x.

       returns Pi/2+i0.

       returns +NaN+i0.

       returns NaN+iNaN and optionally raises the invalid floating-point exception, for finite x.

       (where the sign of the imaginary part of the result is unspecified).

       returns NaN+iNaN.

ERRORS
       No errors are defined.

SEE ALSO
       atan(3M), ctan(3M), complex(5).

STANDARDS CONFORMANCE
       : ISO/IEC C99 (including Annex G, ``IEC 60559-compatible complex arithmetic'')

							     HP Integrity Server Only							 catan(3M)