#18511: LatticePoset: add has_sublattice()
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Reporter: jmantysalo | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.8
Component: combinatorics | Resolution:
Keywords: | Merged in:
Authors: Jori Mäntysalo | Reviewers: Nathann Cohen, Darij
Report Upstream: N/A | Grinberg
Branch: | Work issues:
public/ticket/18511 | Commit:
Dependencies: | 0ef0050b3b959c2115dc9a433d80c62dda905f8f
| Stopgaps:
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Comment (by jmantysalo):
Replying to [comment:21 ncohen]:
> Also, it seems that the code does not work as expected when 'other'
contains points which are not in `self`. That's a trivial 'no', but it
should not be an exception.
I guess that it is mostly an error from the user if he/she ask if `{1,2}`
is a sublattice of a lattice containing `a`, `b` and `a`. So raising an
exceptions sounds better.
But totally another thing is a list vs. a lattice as a parameter. They
feels two different things.
--
Ticket URL: <http://trac.sagemath.org/ticket/18511#comment:25>
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