#17937: Cannot compute integral points of 0-dimensional Polyhedron
------------------------+----------------------------
Reporter: jdemeyer | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.6
Component: geometry | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
------------------------+----------------------------
A trivial case, but it should work anyway:
{{{
sage: P = Polyhedron([[]])
sage: P
A 0-dimensional polyhedron in ZZ^0 defined as the convex hull of 1 vertex
sage: P.integral_points()
---------------------------------------------------------------------------
IndexError Traceback (most recent call
last)
<ipython-input-13-2abbf2adff15> in <module>()
----> 1 P.integral_points()
/usr/local/src/sage-git/local/lib/python2.7/site-
packages/sage/geometry/polyhedron/base.pyc in integral_points(self,
threshold)
3826 box_points<threshold:
3827 from sage.geometry.integral_points import
rectangular_box_points
-> 3828 return rectangular_box_points(box_min, box_max, self)
3829
3830 # for more complicate polytopes, triangulate & use smith
normal form
/usr/local/src/sage-git/src/sage/geometry/integral_points.pyx in
sage.geometry.integral_points.rectangular_box_points
(build/cythonized/sage/geometry/integral_points.c:4761)()
531 v = vector(ZZ, d)
532 if not return_saturated:
--> 533 for p in loop_over_rectangular_box_points(box_min,
box_max, inequalities, d, count_only):
534 # v = vector(ZZ, orig_perm.action(p)) # too slow
535 for i in range(0,d):
/usr/local/src/sage-git/src/sage/geometry/integral_points.pyx in
sage.geometry.integral_points.loop_over_rectangular_box_points
(build/cythonized/sage/geometry/integral_points.c:5605)()
580 while True:
581 inequalities.prepare_inner_loop(p)
--> 582 i_min = box_min[0]
583 i_max = box_max[0]
584 # Find the lower bound for the allowed region
IndexError: list index out of range
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/17937>
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