There is a definition for the signum function for a complex argument. sign( z ) = z / |z| for all z != 0 sign( 0 ) = 0
See e.g. http://en.wikipedia.org/wiki/Sign_function Shouldn't be too difficult to implement. -----Original Message----- From: Carl Mäsak [mailto:[EMAIL PROTECTED] Sent: Mittwoch, 19. November 2008 22:24 To: [EMAIL PROTECTED] Subject: Re: [perl #60674] sign($x) always returns 1 when $x ~~ Complex Moritz (>), Carl (>>): >> <masak> what should the behaviour of sign($x) be when $x is complex? > > I'd argue that it's a Failure. Aye.
