#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 | 9db71143f587b7c69efecc539f5c7cbf9eba5291
Dependencies: | Stopgaps:
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Comment (by jmantysalo):
Replying to [comment:39 ncohen]:
> I suspect that they see it as a "feature".
OK. I'll forget that. Another thing: Why `Poset({1:[2]}).subposet([3])`
gives error message "ValueError: <type 'sage.rings.integer.Integer'> is
not an element of this poset"?
I made a blind commit, have no machine to test it just now. Going to
continue tomorrow.
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New commits:
||[http://git.sagemath.org/sage.git/commit/?id=9db71143f587b7c69efecc539f5c7cbf9eba5291
9db7114]||{{{More on facade, added tests etc.}}}||
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Ticket URL: <http://trac.sagemath.org/ticket/15875#comment:41>
Sage <http://www.sagemath.org>
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