|apply ((saturation_idempotent ?? (A_is_saturation o1) x)^-1);]]
| intros; simplify;
change with (((a34⎻* ∘ a23⎻* ) ∘ a12⎻* ) ∘ A o1 = ((a34⎻* ∘ (a23⎻* ∘ a12⎻* )) ∘ A o1));
- apply rule (#‡ASSOC1\sup -1);
+ apply rule (#‡ASSOC ^ -1);
| intros; simplify;
change with ((a⎻* ∘ (id2 ? o1)⎻* ) ∘ A o1 = a⎻* ∘ A o1);
apply (#‡(id_neutral_right2 : ?));