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Implement one-point suspension and face split of polyhedron #24886
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Branch: u/jipilab/24886 |
Commit: |
Branch pushed to git repo; I updated commit sha1. New commits:
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comment:4
typo: |
comment:5
You should check that you obtain the same answer using a proper vertex or a face of dimension 0
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comment:6
The documentation would also be nicer with:
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Changed keywords from days93, polytope to days93, polytope, thursdaysbdx |
Branch pushed to git repo; I updated commit sha1. Last 10 new commits:
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Changed keywords from days93, polytope, thursdaysbdx to days93, polytope, thursdaysbdx, IMA-PolyGeom |
comment:9
Hi, Thanks Vincent for your review. I made the suggested changes (along with merging the tutorial). I realized while making a test that the method |
Branch pushed to git repo; I updated commit sha1. New commits:
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comment:12
ok, let it be too |
Reviewer: Frédéric Chapoton, Vincent Delecroix |
Changed branch from u/jipilab/24886 to |
The one-point suspension of a vertex
v
of a polyhedronP
of dimensiond
is obtained by placingP
in a dimensiond+1
vector space where the last coordinate is 0, then placing a vertex "over"v
and a vertex "below"v
in the last coordinate and taking the convex hull.One can do a similar construction for faces of polyhedron by placing the two vertices relative to the center of the face. This way we get the face split of
P
.On the way, the
center
function also got modified in the case when it is only a vertex so that it returns the vertex. This was necessary to make the one-point suspension consistent.CC: @videlec @mo271 @mkoeppe @fchapoton
Component: geometry
Keywords: days93, polytope, thursdaysbdx, IMA-PolyGeom
Author: Jean-Philippe Labbé
Branch/Commit:
2d78b87
Reviewer: Frédéric Chapoton, Vincent Delecroix
Issue created by migration from https://trac.sagemath.org/ticket/24886
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