#18934: New (v,6,1)-BIBD with v<=201
-------------------------------------+-------------------------------------
Reporter: ncohen | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.8
Component: combinatorial | Resolution:
designs | Merged in:
Keywords: | Reviewers: Dima Pasechnik
Authors: Nathann Cohen | Work issues:
Report Upstream: N/A | Commit:
Branch: public/18934 | 819bfa02346262814a0ff5ef3a9831eda7579739
Dependencies: | Stopgaps:
-------------------------------------+-------------------------------------
Comment (by ncohen):
> Well, you seem to prefer to hide the know-how how to use LJCR in this
case.
The interface with LJCR has nothing to do with this function. There is no
certitude that their entry will not change, there is no reason to carve in
doctests that ours and theirs should match. This doctest tests more than
the function claims, so it has no reason to be.
> It's not fair to a user that might need to use it for a similar task.
Nobody will have to. With this addition, there is no BIBD to be found on
LJCR that Sage cannot build alone:
{{{
sage: missing = [(v,k) for v in range(101) for k in range(1,v) if
designs.balanced_incomplete_block_design(v,k,existence=True) is Unknown]
sage: for v,k in missing:
....: try:
....: designs.balanced_incomplete_block_design(v,k,use_LJCR=True)
....: print "found"
....: except:
....: pass
....:
sage:
}}}
Do you intend to remove/fix the commit that contains the 'None == None'
tests?
Nathann
--
Ticket URL: <http://trac.sagemath.org/ticket/18934#comment:29>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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