#16500: New recursive constructions of Orthogonal Arrays
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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/16500 | 41c50d5a256d9e746d8acfb33a4ff7c58e05789b
Dependencies: #16499 | Stopgaps:
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Comment (by vdelecroix):
Hi,
small commit at `u/vdelecroix/16500`
Be careful that a truncated OA is '''not''' an incomplete OA. In truncated
OA you removed points in columns whereas in incomplete OA you have less
blocks than an OA (but columns are not changed)... it is very confusing to
read your doc. And moreover you use block or column indifferently but it
would be better to have a unique name for that.
In the doc of the construction 3.4 there is
{{{
- If there exists an `OA(k,m+r+1)` the column of size `s` is truncated in
order to intersect `B_0`.
- If there exists an `OA(k,m+r+1)`, the last column must not intersect
`B_0`
}}}
which is contradictory!
The rest is fine except that there is no need to use linear programming to
build an oval, see #16552.
Vincent
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Ticket URL: <http://trac.sagemath.org/ticket/16500#comment:15>
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