InverseClassesCharTable( tbl )
returns the list mapping each class of the character table tbl to its
inverse class. This list can be regarded as (-1)-st powermap; it is
computed using tbl.irreducibles
.
gap> InverseClassesCharTable( CharTable( "L3(2)" ) ); [ 1, 2, 3, 4, 6, 5 ]
GAP 3.4.4