Brian Schott wrote: > And finding > the inverse by reversing each cycle (below) is also new to > me.
This is actually easy to see. The cycle 2 0 1 means 2->0, 0->1, 1->2. Reversing the cycle reverses all arrows. If a permutation is expressed as a product of disjoint cycles, you can apply this process to each in any order. Best wishes, John ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
