#19779: Hadamard difference set
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Reporter: vdelecroix | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-7.0
Component: combinatorial | Resolution:
designs | Merged in:
Keywords: | Reviewers: Nathann Cohen
Authors: Vincent Delecroix | Work issues:
Report Upstream: N/A | Commit:
Branch: | 90bb303c83af318b3560f2999c283c75f9f6888c
u/vdelecroix/19779 | Stopgaps:
Dependencies: #19778 |
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Comment (by ncohen):
> Because cartesian product does not flatten stuff.
And you need it to be flattened?
> > - As this functions is only building two difference families,
shouldn't it be in some kind
> > of database instead?
>
> A database with one function? Hum...
I was more thinking of moving its two difference families into the
existing database of difference families, in database.py.
> Not the one which are after.
I see. But then the order is important, and it is not really
straightforward to figure it out.
> It will cost 3 of them and I need the `N` to dispatch to the
constructors.
Only two if the `turyn_1965_3x3xK` enters the database. We can also
hardcode the parameters in the if/else, given that they are known.
Nathann
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Ticket URL: <http://trac.sagemath.org/ticket/19779#comment:13>
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