#19659: Poset: inverse function of ordinal_sum()
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Reporter: jmantysalo | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-7.0
Component: combinatorics | Resolution:
Keywords: poset | Merged in:
Authors: Jori Mäntysalo | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/jmantysalo/develop | 4358a5a4574999015ccb9088bdb842dcc738d40c
Dependencies: | Stopgaps:
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Comment (by jmantysalo):
Replying to [comment:8 ncohen]:
> Why do you think it should belong to the `HasseDiagram` class?
Other possibility would be `posets.py`. But then recursive
`ordinal_decomposition`-`connected_components` would unnecessarily create
intermediate posets instead of `HasseDiagram`s. It is slower.
And series-parallel decomposition is nothing more than just trying
"ordinal and parallel decomposition" until there is nothing that can be
done.
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Ticket URL: <http://trac.sagemath.org/ticket/19659#comment:9>
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