DEFINITION ty3_repellent()
TYPE =
∀g:G
.∀c:C
.∀w:T
.∀t:T
.∀u1:T
.ty3 g c (THead (Bind Abst) w t) u1
→∀u2:T
.ty3 g (CHead c (Bind Abst) w) t (lift (S O) O u2)
→(pc3 c u1 u2)→∀P:Prop.P
BODY =
Show proof