On 2012-09-25, at 00:10 , William DeMeo wrote: > Dear Forum, > > I recently tried to reproduce some GAP output for an example that > appears in a manuscript that was recently accepted in final form by > the publisher. However, using GAP 4.5.5 I now get different output > than what appears in my paper. (I wrote the paper while using GAP > 4.4.12.)
Seems that GAP 4.5.5 uses a different list of elements when computing the action. If you use an explicit list of elements, you'll get the previous action: gap> g:=Group([(1,2),(1,2,3)]);; gap> G := Action (g,[ (), (1,2,3), (1,3,2), (2,3), (1,2), (1,3) ], OnRight); Group([ (1,5)(2,4)(3,6), (1,2,3)(4,5,6) ]) gap> for b in AllBlocks(G) do Print(Orbit(G,b,OnSets)-1,"\n"); od; [ [ 0, 4 ], [ 1, 5 ], [ 2, 3 ] ] [ [ 0, 1, 2 ], [ 3, 4, 5 ] ] [ [ 0, 3 ], [ 1, 4 ], [ 2, 5 ] ] [ [ 0, 5 ], [ 2, 4 ], [ 1, 3 ] ] Actually, you could have used `Enumerator(G)' instead of the elements list, but then that enumerator could also change in the future. Cheers Burkhard. _______________________________________________ Forum mailing list Forum@mail.gap-system.org http://mail.gap-system.org/mailman/listinfo/forum
