#18776: From poset to lattice: Do not copy Hasse Diagram
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Reporter: jmantysalo | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-wishlist
Component: combinatorics | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by jmantysalo):
If I remove the line `hasse_diagram = hasse_diagram.copy(immutable=True)`
from `posets.py`, it seems that no test will fail. And still I got `False`
when testing `P._hasse_diagram is Q._hasse_diagram`. Might be because
{{{
self._hasse_diagram = HasseDiagram(hasse_diagram.relabel(rdict,
inplace=False), data_structure="static_sparse")
}}}
in `__init__()` does the copy. Maybe this relates to adding immutable
graphs, and now copying is unnecessary?
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Ticket URL: <http://trac.sagemath.org/ticket/18776#comment:3>
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