Some new GP features
permcycles
permcycles returns the cycle decomposition of a
permutation. Fixed points are returned as length-1 cycles.
? permcycles(Vecsmall([2,7,1,8,4,5,9,10,3,6]))
%12 = [Vecsmall([1,2,7,9,3])
% ,Vecsmall([4,8,10,6,5])]
? permcycles(Vecsmall([3,1,4,5,9,2,6,8,7]))
%13 = [Vecsmall([1,3,4,5,9,7,6,2]),Vecsmall([8])]