If we define a polyhedron as the intersection of half planes and then ask for the list of vertices and a plot, there is weird behavior.
p=Polyhedron(ieqs = [[2, 1, -1]]) print p.Vrepresentation() p.render_solid(aspect_ratio=1).show() Here there is only one half plane (2+x-y>=0), and sage gives: [A line in the direction (1, 1), A vertex at (-2, 0), A ray in the direction (1, 0)] and plots what looks like a strip, with one boundary component correct. The description above is correct, but the plot strongly suggests a strip and not a half plane. In the following variant: q=Polyhedron(ieqs = [[2/3, 1/3, -1/3*sqrt(3)]]) it gives an error: AttributeError: 'Polyhedron' object has no attribute '_ambient_dim' This happens even if there are more half planes so that the intersection is compact. Mladen -- 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
