'RLiftStar f T1 T2 = (lifts f T1 T2).
definition liftable2_sn: predicate (relation term) ≝
- λR. ∀T1,T2. R T1 T2 → ∀f,U1. ⇧*[f] T1 ≘ U1 →
+ λR. ∀T1,T2. R T1 T2 → ∀f,U1. ⇧*[f] T1 ≘ U1 →
∃∃U2. ⇧*[f] T2 ≘ U2 & R U1 U2.
definition deliftable2_sn: predicate (relation term) ≝
∃∃T2. ⇧*[f] T2 ≘ U2 & R T1 T2.
definition liftable2_bi: predicate (relation term) ≝
- λR. ∀T1,T2. R T1 T2 → ∀f,U1. ⇧*[f] T1 ≘ U1 →
+ λR. ∀T1,T2. R T1 T2 → ∀f,U1. ⇧*[f] T1 ≘ U1 →
∀U2. ⇧*[f] T2 ≘ U2 → R U1 U2.
definition deliftable2_bi: predicate (relation term) ≝
lift_lref_ge_minus lift_lref_ge_minus_eq
*)
(* Basic_1: removed theorems 8:
- lift_lref_gt
- lift_head lift_gen_head
+ lift_lref_gt
+ lift_head lift_gen_head
lift_weight_map lift_weight lift_weight_add lift_weight_add_O
lift_tlt_dx
*)