DEFINITION pr2_gen_lift()
TYPE =
∀c:C
.∀t1:T
.∀x:T
.∀h:nat
.∀d:nat
.pr2 c (lift h d t1) x
→∀e:C.(drop h d c e)→(ex2 T λt2:T.eq T x (lift h d t2) λt2:T.pr2 e t1 t2)
BODY =
Show proof