#17053: Add function for disjoint union and ordinal sum of posets
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Reporter: jmantysalo | Owner:
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-wishlist
Component: combinatorics | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/jmantysalo/add_function_for_direct_sum_of_posets|
4b35a5413d0d18e075783484ff8079034e828d51
Dependencies: | Stopgaps:
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Comment (by ncohen):
Hello !
> 4) I don't understand. If you input lattices to ordinal sum, you get
lattices.
I am an idiot, sorry. I misread the doc.
> 7) Which one is logical for A.ordinal_sum(B): to have "A up and B down"
or "B up"? I don't know.
This I do not know. But I would have expected the set of points `(1,x)` to
be greater than the ones labelled with `(0,x)`
> 8) I'm quite sure about that. But how?
Ask the guy in your office (if any) to read it, and if not I will do it
before setting the branch to `positive_review`.
Nathann
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Ticket URL: <http://trac.sagemath.org/ticket/17053#comment:27>
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