DEFINITION sty1_lift() TYPE = ∀g:G .∀e:C .∀t1:T .∀t2:T .sty1 g e t1 t2 →∀c:C.∀h:nat.∀d:nat.(drop h d c e)→(sty1 g c (lift h d t1) (lift h d t2)) BODY =Show proof