proposition: Lemma nth_default_enumerate A ls start idx default : nth_default (start + idx, default) (@enumerate A ls start) idx = (start + idx, nth_default default ls idx).
proof: Proof. rewrite !nth_default_eq; apply nth_enumerate. Qed.
imports: Fiat.Common.Coq__8_4__8_5__Compat Coq.ZArith.ZArith Coq.Lists.List Coq.Lists.SetoidList Coq.Bool.Bool Fiat.Common Fiat.Common.List.Operations Fiat.Common.Equality Fiat.Common.List.FlattenList Fiat.Common.LogicFacts