#15875: Add is_subposet
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Reporter: csar | Owner:
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-6.9
Component: combinatorics | Resolution:
Keywords: posets | Merged in:
Authors: Jori Mäntysalo | Reviewers: Travis Scrimshaw
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/jmantysalo/is_subposet | 00daf69f415aa6f10410dc65841ebe48f592c88b
Dependencies: | Stopgaps:
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Comment (by ncohen):
> True. But that is defined and documented. At least Enumerative
Combinatoric p. 279 says "By a subposet of P, we will always mean an
''induced'' subposet."
Hmmm... Well, the first two papers I got by typing subposet in google say
differently.
http://arxiv.org/pdf/1408.0899v5.pdf
http://arxiv.org/pdf/1106.2315v1.pdf
Actually, the third too (it even appears in the abstract)
http://www.combinatorics.org/ojs/index.php/eljc/article/download/v16i1r142/pdf
Now, well.. Sure Enumeratve Combinatorics is famous and stuff but well...
Honestly, I would make the mistake. Especially when the standard is
different for graphs.
Nathann
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Ticket URL: <http://trac.sagemath.org/ticket/15875#comment:35>
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