Reversed( list )
Reversed
returns a new list that contains the elements of the list
list, which must not contain holes, in reverse order. The argument
list is unchanged.
gap> Reversed( [ 1, 4, 5, 5, 6, 7 ] ); [ 7, 6, 5, 5, 4, 1 ]
The result is a new list, that is not identical to any other list. The elements of that list however are identical to the corresponding elements of the argument list (see Identical Lists).
GAP 3.4.4