include "basic_1/pr2/subst1.ma".
-theorem pr3_subst1:
+lemma pr3_subst1:
\forall (c: C).(\forall (e: C).(\forall (v: T).(\forall (i: nat).((getl i c
(CHead e (Bind Abbr) v)) \to (\forall (t1: T).(\forall (t2: T).((pr3 c t1 t2)
\to (\forall (w1: T).((subst1 i v t1 w1) \to (ex2 T (\lambda (w2: T).(pr3 c
i v t5 w2)) x0 (pr3_sing c x w1 H5 x0 H7) H8)))) (H3 x H6))))) (pr2_subst1 c
e v i H t4 t3 H1 w1 H4)))))))))) t1 t2 H0)))))))).
-theorem pr3_gen_cabbr:
+lemma pr3_gen_cabbr:
\forall (c: C).(\forall (t1: T).(\forall (t2: T).((pr3 c t1 t2) \to (\forall
(e: C).(\forall (u: T).(\forall (d: nat).((getl d c (CHead e (Bind Abbr) u))
\to (\forall (a0: C).((csubst1 d u c a0) \to (\forall (a: C).((drop (S O) d