proposition: Lemma hat_t_sigma p q k: σ p q • t k = t k.
proof: Proof. cbn; now asimpl. Qed.
imports: List Lia Program.Program Undecidability.HOU(std.std axioms) RelationClasses Morphisms Init.Wf Init.Nat Setoid Undecidability.HOU(calculus.calculus second_order.goldfarb.encoding) FinFun Coq.Arith.Wf_nat