DCEPerm(universe,word)
This function computes the permutation  action of  the DCEWord word  on
the  single   cosets described by universe.    The status of universe
should  be ``closed''   or  ``early-closed''.  The   first time this
function (or DCEPerms)  is  called   some  large data  structures   are
computed and stored in universe.
GAP 3.4.4