Le forum de XCAS

I see the different color in the graph. And it occurred to me for a moment that this was the imaginary part, but the help doesn't say anything about this (at least the Spanish help). For plot(x**(1/3),x) I imagined that xcas took 3 as a real number, but I couldn't find a way to tell it to take it as...

Trying to draw a half sphere I came across an unexpected graphic with the following command: plotfunc(sqrt(9-x**2-y**2),[x,y]) I can plot a half-sphere with plotparam() command, but the graph from the previous command isn't what I expected. Is this a bug? Another question is with the following comma...

Thanks, it works now

Graphing several quadrics with the function quadric(), I found this problem with this entry: quadric(x^2-3y^2-2z-2,[x,y,z]) I get the message: Elliptical paraboloid with center [-0.0,-0.0,(x^2-3*y^2-2*z-2)/2.0] And the graph is just a plane. Is this a bug? Or am I doing something wrong? I'm using th...