#19221: Some new (n,2^k,1)-BIBD
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Reporter: ncohen | Owner:
Type: enhancement | Status:
Priority: major | needs_info
Component: combinatorial designs | Milestone: sage-6.9
Keywords: | Resolution:
Authors: Nathann Cohen | Merged in:
Report Upstream: N/A | Reviewers: Vincent
Branch: | Delecroix
78d008dce6ad2f415dc703861b529f6fa0e95841 | Work issues:
Dependencies: | Commit:
| Stopgaps:
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Comment (by ncohen):
> but `labels` are meant to be user-defineable
Whaaaat? I don't know what makes you think that. `labels=False` makes
sense to me. There is nothing in that word that says 'user-defineable' or
anything. If you want to change the labels, `.relabel` is there for you.
> Calling a set of labels chosen by the implementation `labels` is
unhelpful and uninformative, to say the least.
It just means that the structure is not integer-labelled. Any way I cannot
care less: if you chose to overlook that all our functions will have as
many ways to call the same thing (labels, coordinate, ... do you see this
end?) then I will not fight again, it's your win anytime because you are
the reviewer and by Sage's laws you can make my life hell until I give up.
So add a commit.
> > If I remember correctly, the explanation to that lies in the running
times.
> Indeed, it's 50 times faster on PG(2,16). I wonder why...
Surprising. Might be because we are multiplying the elements of the ground
set using Sage, which is always slow for ... well, everything. Perhaps the
way `PG` is called changed in the meantime, I do not remember. If you feel
bad about it you can write a ticket, it's always good to see speed
improvements.
Nathann
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Ticket URL: <http://trac.sagemath.org/ticket/19221#comment:25>
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