DEFINITION subst0_gen_lift_ge()
TYPE =
∀u:T
.∀t1:T
.∀x:T
.∀i:nat
.∀h:nat
.∀d:nat
.subst0 i u (lift h d t1) x
→(le (plus d h) i
→ex2 T λt2:T.eq T x (lift h d t2) λt2:T.subst0 (minus i h) u t1 t2)
BODY =
Show proof