#16295: Faster is_orthogonal_array
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Reporter: ncohen | Owner:
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: u/ncohen/16295 | 31e84b82913815b2005b5e2e45650c1568a45761
Dependencies: #16236 | Stopgaps:
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Comment (by ncohen):
Hello !
Replying to [comment:47 brett]:
> I have made almost all the changes. In the code line
>
>
> {{{
> if verbose:
> print {"OA" : "Columns {} and {} are not orthogonal".format(i,j),
> "MOLS" : "Matrices {} and {} are not
orthogonal".format(i,j)}[terminology]
> return False
> }}}
>
> Is there a compact way of switching depending on the values of i and j
in the case that terminology=MOLS? if i = 0 and j>1 then "square j-2" is
not row latin. if i=1 and J> 1 then square j-2 is not column latin" if
both i,j >2 then "square i-2 is not orthogonal to square j-2"
This block of code is not about each matrix being a latin square.
Actually, this is not checked anywhere so I will add a commit.
This block of code is about the orthogonality of two matrices, i.e. do you
find all possible pairs of integers when you read them simultaneously cell
by cell.
Nathann
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Ticket URL: <http://trac.sagemath.org/ticket/16295#comment:48>
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