proposition: Lemma rdp_list_nonterminals_length_zero : forall ls, List.length ls = 0 -> forall nt, rdp_list_is_valid_nonterminal ls nt = false.
proof: Proof. destruct ls; simpl; trivial; intro; exfalso; omega. Qed.
imports: Fiat.Common.Coq__8_4__8_5__Compat Coq.Lists.List Coq.ZArith.ZArith Fiat.Parsers.ContextFreeGrammar.Core Fiat.Parsers.ContextFreeGrammar.PreNotations Fiat.Parsers.BaseTypes Fiat.Parsers.ContextFreeGrammar.Carriers Fiat.Common Fiat.Common.Equality Fiat.Common.List.Operations Fiat.Common.List.ListFacts