intros l; elim l; simpl in |- *; auto.
intros a H' H'0; inversion H'.
intros a l0 H' a0 H'0 H'1; inversion H'0.
simpl in H0; simpl in H1; simpl in H.
case (declt (fst a0) (fst a)); intros LtE.
change (GBarlR ((a0 :: nil) ++ (a :: nil) ++ l0)) in |- *; auto.
red in |- *; apply monGRBar; simpl in |- *; auto.
inversion H'1; auto.
red in |- *; red in |- *; apply Base.
apply FoundG.
apply FoundE.
unfold ProdRel in |- *; split; auto.
simpl in H0; simpl in H1; simpl in H.
change (GBarlR ((a0 :: nil) ++ (a :: nil) ++ l0)) in |- *; auto.
red in |- *; apply monGRBar; simpl in |- *; auto.
inversion H'1; simpl in |- *; auto.
apply H'; auto.
Qed.

Lemma lem1aux :
forall l : list B,
GoodR B R l -> forall us : list (A * B), l = sndL us -> MinD us -> GBarlR us.