#19163: LatticePoset creation: Empty argument, better error reporting
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Reporter: jmantysalo | Owner:
Type: enhancement | Status: new
Priority: minor | Milestone: sage-wishlist
Component: combinatorics | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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Because `Poset()` creates the empty poset, I think that `LatticePoset()`
should create the empty lattice.
Error reporting is irritating. `LatticePoset({'a':['b','c']})` should say
"no top element" of "no join for 'b' and 'c'" or something similar.
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Ticket URL: <http://trac.sagemath.org/ticket/19163>
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