Section Suma_2.
Context `{TnEQD:Tarski_neutral_dimensionless_with_decidable_point_equality}.
(** ABC <= ABC + DEF. *)
(** DEF <= ABC + DEF. *)
(** LeA preserves SAMS. *)

Lemma sams_lea2__sams : forall A B C D E F A' B' C' D' E' F',
SAMS A' B' C' D' E' F' -> LeA A B C A' B' C' -> LeA D E F D' E' F' ->
SAMS A B C D E F.