proposition: Lemma tm_eqv_eqv (u v: term) (X: pttdom) (f: A -> X) : u ≡ v -> eval f u ≡ eval f v.
proof: Proof. exact. Qed.
imports: HB(structures) Coq(Setoid Morphisms) mathcomp(all_ssreflect) GraphTheory(edone preliminaries setoid_bigop structures)