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Currently the inscription test for polyhedra depends on the order of vertices:
```
sage: Polyhedron(vertices=[[-2,-1], [-2,1], [0,-1], [0,1]]).is_inscribed()
True
sage: P = Polyhedron(vertices=[[-2…
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This ticket gathers tickets related to the `CombinatorialPolyhedron' class.
The goal is to make this class consistent with the base class `Polyhedron_base`.
- #28603: `edge_graph` -> `vertex_graph…
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Duplicate of #28599.
```
sage: polytopes.regular_polygon(3) + polytopes.regular_polygon(8)
```
give assertion error.
Full traceback below.
It appears to be a rather new bug, maybe related to pyth…
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```
sage: P = polytopes.regular_polygon(5, exact=True)
sage: P1 = polytopes.regular_polygon(5, exact=False)
sage: P*P1
...
ValueError: *Input Error: Input format is not correct.
*Format:
begin
…
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We add a method that tests `is_combinatorially_isomorphic`.
Depends on #29898
Depends on #29899
Depends on #29903
CC: @jplab @LaisRast
Component: **geometry**
Keywords: **polyhedra, test suite*…
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```
sage: P = polytopes.dodecahedron(backend='normaliz')
sage: P
A 3-dimensional polyhedron in (Number Field in sqrt5 with defining polynomial x^2 - 5)^3 defined as the convex hull of 20 vertices
s…
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The following Error happens in Sage8.9.beta8:
```
sage: s = polytopes.simplex(7)
sage: f = s.faces(3)[0]
sage: sf = s.stack(f)
----------------------------------------------------------------------…
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On a clean develop branch running `SageMath version 9.1.beta9, Release Date: 2020-03-29`, I get:
```
$ sage -t --long --memlimit=3600 src/sage/geometry/polyhedron/base.py
too many failed tests, no…
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The following lines currently occur:
```
sage: A = polytopes.associahedron(['A',3])
sage: face = A.faces(2)[3]
sage: face
sage: face.as_polyhedron()
/home/jplabbe/sage/local/lib/python2.7/site-pac…
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We implement the ambient volume using backend normaliz.
This is done by return 0 or infinity if the polyhedron is not full-dimensional and not compact respectively.
Otherwise, we take the `induced…