#16323: Construction of BIBD with k=5
-------------------------------------+-------------------------------------
Reporter: ncohen | Owner:
Type: enhancement | Status: needs_info
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/16323 | 07a31304b9d48ef6e07f1dd96c1d3185b8fafc95
Dependencies: #16279 | Stopgaps:
-------------------------------------+-------------------------------------
Comment (by ncohen):
Ahahahah very cool ! I did not even know how a difference family was
defined. Quite straightforward `:-)`
Okay, I agree with your commits except for three things :
- The new function needs an INPUT section
- we have several "Design1_from_design2" functions already, so could it be
`BIBD_from_difference_family` like before ?
- Those two tests are equivalent. Is that on purpose ?
{{{
+ assert ((v-1)%4 == 0 and (v*(v-1))%20 == 0)
+ assert (v%20 == 5 or v%20 == 1)
}}}
Nathann
--
Ticket URL: <http://trac.sagemath.org/ticket/16323#comment:16>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/sage-trac.
For more options, visit https://groups.google.com/d/optout.
