FUNCTION: Perm2Cycle - decompose a permutation into disjoint cycles

CALLING SEQUENCE:

Perm2Cycle(perm)

SG[Perm2Cycle](perm)

PARAMETERS:

perm = any list denoting a permutation

SYNOPSIS:

• The Perm2Cycle function calculates the decomposition of a permutation into disjoint cycles. It does not print the fixed points (cycles of length 1).

• Whenever there is a conflict between the function name Perm2Cycle and another name used in the same session, use the long form SG['Perm2Cycle'].

EXAMPLES:

> with(SG):
> Perm2Cycle([5,4,3,2,1]);
 
                                [[1, 5], [2, 4]]