include "ground_1/preamble.ma".
-theorem insert_eq:
+lemma insert_eq:
\forall (S: Type[0]).(\forall (x: S).(\forall (P: ((S \to Prop))).(\forall
(G: ((S \to Prop))).(((\forall (y: S).((P y) \to ((eq S y x) \to (G y)))))
\to ((P x) \to (G x))))))
(G: ((S \to Prop))).(\lambda (H: ((\forall (y: S).((P y) \to ((eq S y x) \to
(G y)))))).(\lambda (H0: (P x)).(H x H0 (refl_equal S x))))))).
-theorem unintro:
+lemma unintro:
\forall (A: Type[0]).(\forall (a: A).(\forall (P: ((A \to Prop))).(((\forall
(x: A).(P x))) \to (P a))))
\def
\lambda (A: Type[0]).(\lambda (a: A).(\lambda (P: ((A \to Prop))).(\lambda
(H: ((\forall (x: A).(P x)))).(H a)))).
-theorem xinduction:
+lemma xinduction:
\forall (A: Type[0]).(\forall (t: A).(\forall (P: ((A \to Prop))).(((\forall
(x: A).((eq A t x) \to (P x)))) \to (P t))))
\def