1.22 HClasses

HClasses( M )
HClasses( class )

HClasses returns the list of H classes the monoid M. In the second form HClasses returns the list of all H classes in class where class is an R class, an L class or a D class.

    gap> M:= Monoid( Transformation( [ 2, 1, 2 ] ),
    > Transformation( [ 1, 2, 2 ] ) );;
    gap> M.name:= "M";;
    gap> HClasses( M );
    [ HClass( M, Transformation( [ 1, 2, 3 ] ) ), 
      HClass( M, Transformation( [ 2, 1, 2 ] ) ), 
      HClass( M, Transformation( [ 2, 1, 1 ] ) ) ] 

   
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