On Fri, Apr 04, 2008 at 06:51:20PM +0200, TSa wrote: > HaloO, > > why is (1,2,3) X () defined to be the empty list > and not (1,2,3) as is the case with the cartesian > product of sets which X basically is with preserved > order.
(@a X @b X @c).elems == @a.elems * @b.elems * @c.elems
Larry
