#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 jmantysalo):
Example:
{{{
N = Poset({0:[2,3], 1:[3]})
P = N.ordinal_product(N)
}}}
How to make a series-parallel decomposition of `P` for counting linear
extension, or to check if it has one?
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Ticket URL: <http://trac.sagemath.org/ticket/19659#comment:38>
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