2018-12-18 00:50:10 +0100 received badge ● Student (source) 2018-12-18 00:48:29 +0100 asked a question Global Dependency in Polyhedron Volume Hi all, I am new to sage and want to use it in one of my python scripts to calculate the volume of higher dimensional polyhedrons. When executing my script I get a "ZeroDivisionError" for some of the polyhedrons. However when run in an individual script they work perfectly fine as long as there is no other calculation beforehand. Here is an example, the file is called DebugSageVolume.py and I execute it with "sage -python DebugSageVolume.py" under Ubuntu 18.04, SageMath version 8.1 #!/usr/lib/python2.7/dist-packages/sage -python from sage.all import * # this works fine matrix1 = matrix(RR, [[0, 1, 0, 0, 0], [1, -1, 0, 0, 0], [0, 0, 1, 0, 0], [1, 0, -1, 0, 0], [0, 0, 0, 1, 0], [1, 0, 0, -1, 0], [0, 0, 0, 0, 1], [1, 0, 0, 0, -1], [0.5, -0.5, -0.5, -0.5, -0.5], [-0.5, 0.5, 0.5, 0.5, 0.5]]) poly1 = Polyhedron(ieqs=matrix1) volume1 = poly1.volume(measure="induced") print(volume1) #this results in an error when executed after the above. But when commenting the above this works fine matrix2 = matrix(RR, [[0, 1, 0, 0, 0], [1, -1, 0, 0, 0], [0, 0, 1, 0, 0], [1, 0, -1, 0, 0], [0, 0, 0, 1, 0], [1, 0, 0, -1, 0], [0, 0, 0, 0, 1], [1, 0, 0, 0, -1], [0.75, -0.5, -0.5, -0.5, -0.5], [-0.75, 0.5, 0.5, 0.5, 0.5]]) poly2 = Polyhedron(ieqs=matrix2) volume2 = poly2.volume(measure="induced") print(volume2)  Any help would be greatly appreciated, thank you. Michael