PermGroupOps.NrMovedPoints( G )
PermGroupOps.NrMovedPoints
returns the number of moved points of the
permutation group G, i.e., points which are moved by at least one
element of G (also see PermGroupOps.MovedPoints).
gap> s4 := Group( (1,3,5,7), (1,3) );; gap> PermGroupOps.NrMovedPoints( s4 ); 4 gap> PermGroupOps.NrMovedPoints( Group( () ) ); 0
GAP 3.4.4