Sublist( list, inds )
Sublist returns a new list in which the i-th element is the element
list[ inds[ i ] ], of the list list. inds must be a list of
positive integers without holes, it need, however, not be sorted and may
contains duplicate elements. If list[ inds[ i ] ] is unbound for
an i, an error is signalled.
gap> Sublist( [ 2, 3, 5, 7, 11, 13, 17, 19 ], [4..6] );
[ 7, 11, 13 ]
gap> Sublist( [ 2, 3, 5, 7, 11, 13, 17, 19 ], [1,7,1,8] );
[ 2, 17, 2, 19 ]
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).
Filtered (see Filtered) allows you to extract elements from a list
according to a predicate.
Sublist has been made obsolete by the introduction of the construct
list{ inds } (see List Elements).
GAP 3.4.4