#19191: LatticePoset: add is_planar()
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Reporter: jmantysalo | Owner:
Type: enhancement | Status: needs_info
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__|
da6a1f9536ac362eef45f565515c752afdf9c84f
Dependencies: #19193 | Stopgaps:
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Changes (by jmantysalo):
* status: needs_review => needs_info
* dependencies: => #19193
Comment:
I committed a version with new name for the function.
But still, I do not understand. The term ''planar lattice'' is used by D.
Kelly and I. Rival in Canadian Journal of Mathematics, june 1975. And it
uses the definition I suggested at start. Also
http://www.math.uh.edu/~hjm/1973_Lattice/p00512-p00518.pdf etc. uses this
definition.
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Ticket URL: <http://trac.sagemath.org/ticket/19191#comment:20>
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