proposition: Lemma fexp_plus A (f : A -> A) n m : fexp f (n + m) = fcompose (fexp f n) (fexp f m).
proof: Proof. by induction n; ins; rewrite IHn. Qed.
imports: Arith micromega.Lia Setoid IndefiniteDescription ClassicalChoice HahnBase HahnList HahnEquational HahnRewrite HahnRelationsBasic HahnSets HahnNatExtra HahnListBefore HahnWf HahnSorted HahnTotalExt