#18972: twographs and Seidel switching
-------------------------------------+-------------------------------------
       Reporter:  dimpase            |        Owner:
           Type:  enhancement        |       Status:  needs_work
       Priority:  major              |    Milestone:  sage-6.9
      Component:  graph theory       |   Resolution:
       Keywords:                     |    Merged in:
        Authors:                     |    Reviewers:  Nathann Cohen
Report Upstream:  N/A                |  Work issues:
         Branch:                     |       Commit:
  u/dimpase/seidelsw                 |  4e077dbd9d039c9c375227269cda8a0ce4c0d326
   Dependencies:  #18960, #18948,    |     Stopgaps:
  #18988, #18991, #18986, #19018,    |
  #19019                             |
-------------------------------------+-------------------------------------

Comment (by dimpase):

 Replying to [comment:94 ncohen]:
 > Please address all the comments or tell my why you chose not to. I can
 still see `designs.TwoGraph`.

 well, `designs.TAB` gives
 {{{
 designs.AffineGeometryDesign
 designs.BalancedIncompleteBlockDesign
 designs.BlockDesign
 designs.DesarguesianProjectivePlaneDesign
 designs.Hadamard3Design
 designs.HadamardDesign
 designs.HughesPlane
 designs.Hypergraph
 designs.IncidenceStructure
 designs.ProjectiveGeometryDesign
 designs.TwoGraph
 designs.WittDesign
 designs.balanced_incomplete_block_design
 designs.best_known_covering_design_from_LJCR
 designs.difference_family
 designs.difference_matrix
 designs.group_divisible_design
 designs.incomplete_orthogonal_array
 designs.kirkman_triple_system
 designs.mutually_orthogonal_latin_squares
 designs.orthogonal_array
 designs.orthogonal_arrays
 designs.projective_plane
 designs.resolvable_balanced_incomplete_block_design
 designs.steiner_quadruple_system
 designs.steiner_triple_system
 designs.transversal_design
 }}}

 Quite a few of them added by you, right? Why do you ask me to make
 `TwoGraph` a second-class citizen then? I don't mind it removed, but then
 in the same sweep as the rest. So this is not for this ticket...

--
Ticket URL: <http://trac.sagemath.org/ticket/18972#comment:113>
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