theorem pippo: \forall (P,Q,R:nat \to Prop).
\forall x,y. x=y \to P x \to Q x \to R x.
intros.
- try rewrite > P in Q.
+ rewrite > P in Q.
(*
-theorem pippo2: \forall (P,Q,R:nat \to Prop).
- \forall x,y. x=y \to P x \to Q x \to R x.
- intros. rewrite > H in y.
-*)
+theorem pippo: \forall (P,Q,R:nat \to Prop).
+ \forall x,y. x=y \to P x \to Q x \to R x.
+ intros. rewrite > H in y.
+*)
\ No newline at end of file