#16597: Singer difference set and fix OA_9_135
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       Reporter:  vdelecroix         |        Owner:
           Type:  enhancement        |       Status:  needs_work
       Priority:  major              |    Milestone:  sage-6.3
      Component:  combinatorial      |   Resolution:
  designs                            |    Merged in:
       Keywords:                     |    Reviewers:
        Authors:  Vincent Delecroix  |  Work issues:
Report Upstream:  N/A                |       Commit:
         Branch:                     |  ec6df26f4d72c5eb939a9b02cd3ad809feacb105
  u/vdelecroix/16597                 |     Stopgaps:
   Dependencies:                     |
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Comment (by ncohen):

 Sorry, my last comment above is incorrect : what you need is a 2-plane
 defined by the set of 1-space it contains, and the group action which
 sends a 1-space on another 1-space by multiplication.

 Nathann

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Ticket URL: <http://trac.sagemath.org/ticket/16597#comment:7>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
and MATLAB

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