fact: Parameter equiv_subst : forall s t, equiv s t -> forall sigma, equiv (apply_subst sigma s) (apply_subst sigma t).
imports: Coq(Bool Peano List PeanoNat) CoLoR(closure more_list equiv_list list_permut dickson) Coq(Relations Wellfounded Arith Wf_nat Recdef Program Morphisms Lia) CoLoR(term_spec term decidable_set ordered_set NatCompat)