#9954: f_vector outputs an extra top-dimensional cell
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Reporter: schilly | Owner: mhampton
Type: defect | Status: needs_review
Priority: major | Milestone: sage-4.6.1
Component: geometry | Keywords:
Author: Volker Braun | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Changes (by newvalueoldvalue):
* cc: novoselt (added)
* status: new => needs_review
* milestone: sage-4.6 => sage-4.6.1
* author: => Volker Braun
Comment:
The attached patch removes the old `face_lattice()` implementation and
replaces it with Andrey's implementation of the same algorithm from
`sage/geometry/cone.py` plus a few extensions to deal with general
polyhedra. The function `hasse_diagram_from_incidences` is moved from
`cone.py` to `polyhedra.py`. It also introduces a new class
`PolyhedronFace` to abstract the faces. Now produces sane output on
various degenerate polyhedra.
Patch might depend on #9798, #10148, #10024. Should be logically
independent, but there will be some fuzz.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9954#comment:1>
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