Ask Your Question

Revision history [back]

click to hide/show revision 1
initial version

asked 2017-06-13 23:51:05 +0200

Akababa gravatar image

Polyhedron.volume() ZeroDivisionError

def vol(c): S = [g * c for g in G] return Polyhedron(S).volume() vol(vector([1.1,0.1,1]))

Here, G is the list of rotation matrices in SO(3) corresponding to the octahedral symmetry group. However when I try to run this code it gives a ZeroDivisionError. Can I do anything to fix it? It seems to work for all integer vectors but fails on most random RDF vectors.

Code to generate G:

G = [
matrix( ((0, 0, -1), (-1, 0, 0), (0, 1, 0)) ),
matrix( ((-1, 0, 0), (0, 0, 1), (0, 1, 0)) ),
matrix( ((0, 1, 0), (0, 0, -1), (-1, 0, 0)) ),
matrix( ((-1, 0, 0), (0, 0, -1), (0, -1, 0)) ),
matrix( ((0, 0, 1), (1, 0, 0), (0, 1, 0)) ),
matrix( ((1, 0, 0), (0, -1, 0), (0, 0, -1)) ),
matrix( ((0, 0, 1), (-1, 0, 0), (0, -1, 0)) ),
matrix( ((1, 0, 0), (0, 1, 0), (0, 0, 1)) ),
matrix( ((0, 1, 0), (0, 0, 1), (1, 0, 0)) ),
matrix( ((0, -1, 0), (0, 0, -1), (1, 0, 0)) ),
matrix( ((0, -1, 0), (0, 0, 1), (-1, 0, 0)) ),
matrix( ((0, 0, -1), (0, -1, 0), (-1, 0, 0)) ),
matrix( ((0, 1, 0), (1, 0, 0), (0, 0, -1)) ),
matrix( ((0, -1, 0), (-1, 0, 0), (0, 0, -1)) ),
matrix( ((0, 0, -1), (1, 0, 0), (0, -1, 0)) ),
matrix( ((-1, 0, 0), (0, -1, 0), (0, 0, 1)) ),
matrix( ((1, 0, 0), (0, 0, -1), (0, 1, 0)) ),
matrix( ((0, 0, 1), (0, 1, 0), (-1, 0, 0)) ),
matrix( ((0, 1, 0), (-1, 0, 0), (0, 0, 1)) ),
matrix( ((-1, 0, 0), (0, 1, 0), (0, 0, -1)) ),
matrix( ((0, -1, 0), (1, 0, 0), (0, 0, 1)) ),
matrix( ((1, 0, 0), (0, 0, 1), (0, -1, 0)) ),
matrix( ((0, 0, 1), (0, -1, 0), (1, 0, 0)) ),
matrix( ((0, 0, -1), (0, 1, 0), (1, 0, 0)) )
]

Polyhedron.volume() ZeroDivisionError

def vol(c): S = [g * c for g in G] return Polyhedron(S).volume() vol(vector([1.1,0.1,1]))

Here, G is the list of rotation matrices in SO(3) corresponding to the octahedral symmetry group. However when I try to run this code it gives a ZeroDivisionError. Can I do anything to fix it? It seems to work for all integer vectors but fails on most random RDF vectors.

Code to generate G:

G = [
matrix( ((0, 0, -1), (-1, 0, 0), (0, 1, 0)) ),
matrix( ((-1, 0, 0), (0, 0, 1), (0, 1, 0)) ),
matrix( ((0, 1, 0), (0, 0, -1), (-1, 0, 0)) ),
matrix( ((-1, 0, 0), (0, 0, -1), (0, -1, 0)) ),
matrix( ((0, 0, 1), (1, 0, 0), (0, 1, 0)) ),
matrix( ((1, 0, 0), (0, -1, 0), (0, 0, -1)) ),
matrix( ((0, 0, 1), (-1, 0, 0), (0, -1, 0)) ),
matrix( ((1, 0, 0), (0, 1, 0), (0, 0, 1)) ),
matrix( ((0, 1, 0), (0, 0, 1), (1, 0, 0)) ),
matrix( ((0, -1, 0), (0, 0, -1), (1, 0, 0)) ),
matrix( ((0, -1, 0), (0, 0, 1), (-1, 0, 0)) ),
matrix( ((0, 0, -1), (0, -1, 0), (-1, 0, 0)) ),
matrix( ((0, 1, 0), (1, 0, 0), (0, 0, -1)) ),
matrix( ((0, -1, 0), (-1, 0, 0), (0, 0, -1)) ),
matrix( ((0, 0, -1), (1, 0, 0), (0, -1, 0)) ),
matrix( ((-1, 0, 0), (0, -1, 0), (0, 0, 1)) ),
matrix( ((1, 0, 0), (0, 0, -1), (0, 1, 0)) ),
matrix( ((0, 0, 1), (0, 1, 0), (-1, 0, 0)) ),
matrix( ((0, 1, 0), (-1, 0, 0), (0, 0, 1)) ),
matrix( ((-1, 0, 0), (0, 1, 0), (0, 0, -1)) ),
matrix( ((0, -1, 0), (1, 0, 0), (0, 0, 1)) ),
matrix( ((1, 0, 0), (0, 0, 1), (0, -1, 0)) ),
matrix( ((0, 0, 1), (0, -1, 0), (1, 0, 0)) ),
matrix( ((0, 0, -1), (0, 1, 0), (1, 0, 0)) )
]
click to hide/show revision 3
None

updated 2017-07-13 23:53:44 +0200

vdelecroix gravatar image

Polyhedron.volume() ZeroDivisionError

def vol(c): S = [g * c for g in G] return Polyhedron(S).volume() vol(vector([1.1,0.1,1]))

Here, G is the list of rotation matrices in SO(3) corresponding to the octahedral symmetry group. However when I try to run this code it gives a ZeroDivisionError. Can I do anything to fix it? It seems to work for all integer vectors but fails on most random RDF vectors.

Code to generate G:

G = [
matrix( ((0, 0, -1), (-1, 0, 0), (0, 1, 0)) ),
matrix( ((-1, 0, 0), (0, 0, 1), (0, 1, 0)) ),
matrix( ((0, 1, 0), (0, 0, -1), (-1, 0, 0)) ),
matrix( ((-1, 0, 0), (0, 0, -1), (0, -1, 0)) ),
matrix( ((0, 0, 1), (1, 0, 0), (0, 1, 0)) ),
matrix( ((1, 0, 0), (0, -1, 0), (0, 0, -1)) ),
matrix( ((0, 0, 1), (-1, 0, 0), (0, -1, 0)) ),
matrix( ((1, 0, 0), (0, 1, 0), (0, 0, 1)) ),
matrix( ((0, 1, 0), (0, 0, 1), (1, 0, 0)) ),
matrix( ((0, -1, 0), (0, 0, -1), (1, 0, 0)) ),
matrix( ((0, -1, 0), (0, 0, 1), (-1, 0, 0)) ),
matrix( ((0, 0, -1), (0, -1, 0), (-1, 0, 0)) ),
matrix( ((0, 1, 0), (1, 0, 0), (0, 0, -1)) ),
matrix( ((0, -1, 0), (-1, 0, 0), (0, 0, -1)) ),
matrix( ((0, 0, -1), (1, 0, 0), (0, -1, 0)) ),
matrix( ((-1, 0, 0), (0, -1, 0), (0, 0, 1)) ),
matrix( ((1, 0, 0), (0, 0, -1), (0, 1, 0)) ),
matrix( ((0, 0, 1), (0, 1, 0), (-1, 0, 0)) ),
matrix( ((0, 1, 0), (-1, 0, 0), (0, 0, 1)) ),
matrix( ((-1, 0, 0), (0, 1, 0), (0, 0, -1)) ),
matrix( ((0, -1, 0), (1, 0, 0), (0, 0, 1)) ),
matrix( ((1, 0, 0), (0, 0, 1), (0, -1, 0)) ),
matrix( ((0, 0, 1), (0, -1, 0), (1, 0, 0)) ),
matrix( ((0, 0, -1), (0, 1, 0), (1, 0, 0)) )
]
click to hide/show revision 4
None

updated 2017-07-13 23:54:08 +0200

vdelecroix gravatar image

Polyhedron.volume() ZeroDivisionError

Let us consider the following function

def vol(c):
     S = [g * c for g in G] 
     return Polyhedron(S).volume()
    vol(vector([1.1,0.1,1]))
vol(vector([1.1,0.1,1]))

Here, G is the list of rotation matrices in SO(3) corresponding to the octahedral symmetry group. However when I try to run this code it gives a ZeroDivisionError. Can I do anything to fix it? It seems to work for all integer vectors but fails on most random RDF vectors.

Code to generate G:

G = [
matrix( ((0, 0, -1), (-1, 0, 0), (0, 1, 0)) ),
matrix( ((-1, 0, 0), (0, 0, 1), (0, 1, 0)) ),
matrix( ((0, 1, 0), (0, 0, -1), (-1, 0, 0)) ),
matrix( ((-1, 0, 0), (0, 0, -1), (0, -1, 0)) ),
matrix( ((0, 0, 1), (1, 0, 0), (0, 1, 0)) ),
matrix( ((1, 0, 0), (0, -1, 0), (0, 0, -1)) ),
matrix( ((0, 0, 1), (-1, 0, 0), (0, -1, 0)) ),
matrix( ((1, 0, 0), (0, 1, 0), (0, 0, 1)) ),
matrix( ((0, 1, 0), (0, 0, 1), (1, 0, 0)) ),
matrix( ((0, -1, 0), (0, 0, -1), (1, 0, 0)) ),
matrix( ((0, -1, 0), (0, 0, 1), (-1, 0, 0)) ),
matrix( ((0, 0, -1), (0, -1, 0), (-1, 0, 0)) ),
matrix( ((0, 1, 0), (1, 0, 0), (0, 0, -1)) ),
matrix( ((0, -1, 0), (-1, 0, 0), (0, 0, -1)) ),
matrix( ((0, 0, -1), (1, 0, 0), (0, -1, 0)) ),
matrix( ((-1, 0, 0), (0, -1, 0), (0, 0, 1)) ),
matrix( ((1, 0, 0), (0, 0, -1), (0, 1, 0)) ),
matrix( ((0, 0, 1), (0, 1, 0), (-1, 0, 0)) ),
matrix( ((0, 1, 0), (-1, 0, 0), (0, 0, 1)) ),
matrix( ((-1, 0, 0), (0, 1, 0), (0, 0, -1)) ),
matrix( ((0, -1, 0), (1, 0, 0), (0, 0, 1)) ),
matrix( ((1, 0, 0), (0, 0, 1), (0, -1, 0)) ),
matrix( ((0, 0, 1), (0, -1, 0), (1, 0, 0)) ),
matrix( ((0, 0, -1), (0, 1, 0), (1, 0, 0)) )
]
Copyright Sage, 2010. Some rights reserved under creative commons license. Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.
about | faq | help | privacy policy | terms of service
Powered by Askbot version 0.7.59