77.11 PositionId and PositionSgn

PositionId( W )

PositionSgn( W )

return the position of the trivial and the sign character, respectively, in the character table of the group W.

    gap> W := CoxeterGroup( "D", 4 );;
    gap> PositionId( W );
    13
    gap> PositionSgn( W );
    4

For PositionId, one could also give an arbitrary finite group or its character table as argument.

See also ChevieClassInfo.

This function requires the package "chevie" (see RequirePackage). Previous Up Top
Index