End SIMULATION_OPT.
End FORWARD_SIMU_DIAGRAMS.
(** ** Forward simulation of transition sequences *)
Section SIMULATION_SEQUENCES.
Context L1 L2 index order match_states (S: fsim_properties L1 L2 index order match_states).

Lemma simulation_forever_reactive:
forall i s1 s2 T,
Forever_reactive L1 s1 T -> match_states i s1 s2 ->
Forever_reactive L2 s2 T.