#16598: New empty design classes for a better user interface and new
is_group_divisible_design Cython function
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Reporter: ncohen | Owner: ncohen
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.3
Component: combinatorial | Resolution:
designs | Merged in:
Keywords: | Reviewers:
Authors: Nathann Cohen | Work issues:
Report Upstream: N/A | Commit:
Branch: | 1a9ae44eb163fd218e592c47ecb49a87cb7741d2
u/vdelecroix/16598 | Stopgaps:
Dependencies: #16553, #16766 |
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Comment (by ncohen):
Yooooo !
> {{{
> sage: I = IncidenceStructure(4,[[0,1,2],[1,3]])
> sage: I.ground_set()
> [0, 1, 2, 3]
> sage: I.relabel({0:3,1:2,2:1,3:0})
> sage: I.ground_set()
> [3, 2, 1, 0]
> }}}
> the ground set has changed...
Well, as a list it has, not as a set...
I think that being smart here only raises new problems. Relabelling all
blocks takes much more time and memory than relabelling the points only.
We could hide that by returning a sorted list of points, but well...
Nathann
--
Ticket URL: <http://trac.sagemath.org/ticket/16598#comment:48>
Sage <http://www.sagemath.org>
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