#16272: redesign transversal designs
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Reporter: vdelecroix | Owner: Vincent Delecroix
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.2
Component: combinatorics | Resolution:
Keywords: designs, | Merged in:
orthogona arrays | Reviewers:
Authors: Vincent Delecroix | Work issues:
Report Upstream: N/A | Commit:
Branch: public/16272 | ba058dd515c38084b4cdeacf530eda7b4563d211
Dependencies: #15310, #16227 | Stopgaps:
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Comment (by ncohen):
Yo !
> - implement my own `projective_space_as_OA` inside
`orthogonal_arrays.py`. This might sound weird but the current
implementation of `ProjectiveSpaceDesign` is slow and scarry me (I plan to
clean it soon in a ticket).
THis thing has *NOTHING* to do here. Use the current
`ProjectivePlaneDesigns`, and write another ticket to change the code if
you don't like it. I agree that it is slow, but implementing the function
TWICE (one that is slow, one that is hidden in an unrelated module) is not
a way to solve it.
> - implement a beautiful `TD_existence` (I do not like the name, so I
aks for suggestions here):
Beautiful ? Is that a joke ? A function that PRINTS text ?
Get this thing out of here until a proper interface design is found. A
function like that should RETURN values, not print stuff. Plus we have
almost no negative result to advertise for the moment. Plus how the hell
is an user going to find that ? We write Sage code here, not our own
scripts !!!
If such a function is to ever be implemented, it will return a pair "lower
bound, upper bound". The only interesting data in your three lines are TWO
NUMBERS, and wrapping them in intervals for nothing, adding a 2 there and
an infinity there looks fancy, but once more we work on a library here,
not on your own code.
> I also correct some of the errors raised to get mainly `EmptySetError`
and `NotImplementedError`.
I will look at that when the problems above are solved....
Nathann
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Ticket URL: <http://trac.sagemath.org/ticket/16272#comment:19>
Sage <http://www.sagemath.org>
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