#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 | 01f9e1c6bb502e6044181c856bcb8984718fd237
Dependencies: | Stopgaps:
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Comment (by ncohen):
Yooooooo,
> I think that "visible" poset functions, i.e. those not starting with
`_`, should give meaningful set of operations to do with posets. It does
not always directly correspond with good structure for internal functions.
So should I add a `_`-function to `posets.py` or add a strange option for
`ordinal_decomposition` to be used just for series-parallel decomposition?
Both options sounds strange, as the already have "internal" class.
You seem to say that implementing this function would have you implement a
helper function, which you do not think would be user-friendly enough to
deserve being public. Could you tell me what this function would do? I do
not see what you have in mind. Surely you are not talking of the
`ordinal_sum_decomposition` itself, as you made it publicly available in
this branch?
Nathann
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Ticket URL: <http://trac.sagemath.org/ticket/19659#comment:32>
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