Dear Pierre, > Greetings, > > i'm looking for a function , say F, such that > > F((1,2,3)(5,6)) = [[1,2,3],[5,6]].
Try this: gap> CyclesOfTransformation(AsTransformation((1,2,3)(5,6))); [ [ 1, 2, 3 ], [ 4 ], [ 5, 6 ] ]gap> CyclesOfTransformation(AsTransformation((1,2,3)(5,6))); [ [ 1, 2, 3 ], [ 4 ], [ 5, 6 ] ] (This is available since GAP 4.7 so please make it sure you are using a fresh release) To convert such notation back see e.g. Jack Schmidt's reply here: http://math.stackexchange.com/questions/815071/list-vs-permutation-representation/815167#815167 Hope this helps Alexander > > My goal is to use the output list as index to fetch string from a > separate list (eg: ["a","b","c","d","e"]). I need to express > permutation on the latter (eg: ("a","b","c")("d","e")) ) , do some > computation using gap permutation group, and convert back the output of > gap to permutation of these strings. > > I've seen PermList and ListPerm but it's not a cyclic notation. There's > possibly better way to make a permutation acting on an ordred set of > string but my point is the input/output with gap. > > -- > Pierre-Alain BOURDIL > pabou...@laas.fr <mailto:pabou...@laas.fr> > pierre-alain.bour...@fr.thalesgroup.com > <mailto:pierre-alain.bour...@fr.thalesgroup.com> > _______________________________________________ > Forum mailing list > Forum@mail.gap-system.org > http://mail.gap-system.org/mailman/listinfo/forum > _______________________________________________ Forum mailing list Forum@mail.gap-system.org http://mail.gap-system.org/mailman/listinfo/forum
