In the following I expected the line $y=x$ in red for q; and the line $y=-x$ in yellow for p. The plot for p is as desired, but the plot for q contains also the line $y=-x$. This is using sage 4.6.1
#Is this a bug? x,y=var('x y') q=implicit_plot((x-y)/(x+y)==0,(x,-2,2),(y,-2,2),color='red') p=implicit_plot((x+y)/(x-y)==0,(x,-2,2),(y,-2,2),color='yellow') show(q) show(p) show(p+q) -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org