include "basic_1/s/fwd.ma".
-theorem csubst1_ind:
+implied lemma csubst1_ind:
\forall (i: nat).(\forall (v: T).(\forall (c1: C).(\forall (P: ((C \to
Prop))).((P c1) \to (((\forall (c2: C).((csubst0 i v c1 c2) \to (P c2)))) \to
(\forall (c: C).((csubst1 i v c1 c) \to (P c))))))))
c0 with [csubst1_refl \Rightarrow f | (csubst1_sing x x0) \Rightarrow (f0 x
x0)])))))))).
-theorem csubst1_gen_head:
+lemma csubst1_gen_head:
\forall (k: K).(\forall (c1: C).(\forall (x: C).(\forall (u1: T).(\forall
(v: T).(\forall (i: nat).((csubst1 (s k i) v (CHead c1 k u1) x) \to (ex3_2 T
C (\lambda (u2: T).(\lambda (c2: C).(eq C x (CHead c2 k u2)))) (\lambda (u2: