#19892: Face semigroup of hyperplane arrangement
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Reporter: darij | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-7.0
Component: geometry | Keywords: hyperplane
Merged in: | arrangements, semigroups, polyhedra
Reviewers: | Authors: Darij Grinberg
Work issues: | Report Upstream: N/A
Commit: | Branch:
2ba781d9bec2db5d4e088a528729d3dbfaa11952| public/ticket/19892
Stopgaps: | Dependencies:
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The branch implements the closed faces of a hyperplane arrangement, the
multiplication of the face semigroup, and its semigroup algebra.
The semigroup itself is not implemented, since I cannot find a way to
build a finite semigroup (or magma) out of a multiplication table. I could
make this myself, but I feel stupid doing this, as I would likely just
duplicate something existing (and not very well, as I still don't grok the
category framework). I *can* add it if you want me to.
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Ticket URL: <http://trac.sagemath.org/ticket/19892>
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