#19191: LatticePoset: add is_planar()
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Reporter: jmantysalo | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.9
Component: combinatorics | Resolution:
Keywords: | Merged in:
Authors: Jori Mäntysalo | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/jmantysalo/latticeposet__add_is_planar__|
c669ecbf2476518175f0719ba25e76cdc05f1521
Dependencies: | Stopgaps:
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Comment (by jmantysalo):
This is about planarity of lattices, not posets in general.
See for example
http://www.sciencedirect.com/science/article/pii/0095895676900241 or
http://www.math.louisville.edu/Cumberland/slides/52%20-%20Trotter.pdf
slide 12.
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Ticket URL: <http://trac.sagemath.org/ticket/19191#comment:12>
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