Indexed
Indexed[expr_, i_]represents the component of expr with index i and formats as expected in traditional form.
Indexed[expr_, {i_, j_, ...}]For example
Indexed[x, {1,2}](*TB[*)Indexed[(*|*)x(*|*), {(*|*)1,2(*|*)}](*|*)(*1:eJxTTMoPSmMAgmIuIOGZl5JakZrilF8BAECTBhI=*)(*]TB*) If expr represents a List, a corresponding Part of this list will be taken