El mi?, 26-12-2012 a las 16:05 +0100, Adam escribi?:
> Hi,
>
> How can I draw points z defined by inequality :
>
>
> (C*z^6)/z < 0 ;
>
I think you mean (C*z^6)/z \in (-\infty, 0)
This is equivalent to
Im(C*z^5) = 0 and Re(C*z^5) < 0
The first condition is a curve and the second is a region of the plane.
The intersection is also curve. You can plot both sets separately; here,
the curve is in blue and the region is filled in red. You can get an
idea on the intersection.
load(draw) $
C : 15.31858176724506-17.39503852518886*%i $
expr: C*(x+y*%i)^5 $
define(rp(x,y), realpart(expr)) $
define(ip(x,y), imagpart(expr)) $
draw2d(
terminal = pngcairo,
/* Re(C*z^5) < 0 */
x_voxel = 50,
y_voxel = 50,
region(rp(x,y) < 0,x,-1,1,y,-1,1),
/* Im(C*z^5) = 0 */
line_width = 3,
ip_grid=[100,100],
implicit(ip(x,y) = 0,x,-1,1,y,-1,1) ) $
I am not sure this is what you need.
--
Mario