#19215: Posets: Add is_series_parallel()
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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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Description changed by jmantysalo:
Old description:
> Wait until #13744 is fixed. Wrap `is_prime()` on graphs to
> `is_series_parallel()` on posets. Maybe also wrap
> `modular_decomposition()` as `is_series_parallel(certificate=True)`.
New description:
Add a function to see if a poset is series-parallel (or "N-free").
First wait for #19659 to get closed. Series-parallel decomposition is just
recursive applying of `connected_components()` and
`ordinal_sum_decomposition()`.
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Ticket URL: <http://trac.sagemath.org/ticket/19215#comment:3>
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