#9810: Heisenbug in RationalPolyhedralCone.facets
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Reporter: vbraun | Owner: mhampton
Type: defect | Status: new
Priority: major | Milestone:
Component: geometry | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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The `faces` method of a cone in a fan manages to screw up subsequent
`facet` output:
{{{
sage: cone = toric_varieties.dP8().fan().generating_cone(0)
sage: cone
2-d cone of Rational polyhedral fan in 2-d lattice N
sage: cone.facets()
(1-d cone of Rational polyhedral fan in 2-d lattice N, 1-d cone of
Rational polyhedral fan in 2-d lattice N)
sage: cone.faces()
((0-d cone of Rational polyhedral fan in 2-d lattice N,), (1-d cone of
Rational polyhedral fan in 2-d lattice N, 1-d cone of Rational polyhedral
fan in 2-d lattice N), (2-d cone of Rational polyhedral fan in 2-d lattice
N,))
sage: cone.facets()
(2-d cone of Rational polyhedral fan in 2-d lattice N,)
}}}
This is on vanilla Sage 4.5.2 without any patches applied. Andrey, I think
its somewhere in your code so you'll probably find it faster than I can.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9810>
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