Entry Value
Name INFINITY_AX
Conclusion ?f. ONE_ONE f /\ ~ONTO f
Constructive Proof Yes
Axiom 
(\a. (\b. b = (\c. (\d. d) = (\d. d)))
     (\e. (\f g.
               (\h i.
                    (\j. j h i) =
                    (\k. k ((\d. d) = (\d. d)) ((\d. d) = (\d. d))))
               f
               g <=>
               f)
          ((\l. l = (\m. (\d. d) = (\d. d)))
          (\n. (\f g.
                    (\h i.
                         (\j. j h i) =
                         (\k. k ((\d. d) = (\d. d)) ((\d. d) = (\d. d))))
                    f
                    g <=>
                    f)
               (a n)
               e))
          e))
(\p. (\h i. (\j. j h i) = (\k. k ((\d. d) = (\d. d)) ((\d. d) = (\d. d))))
     ((\q. q = (\r. (\d. d) = (\d. d)))
     (\s. (\q. q = (\r. (\d. d) = (\d. d)))
          (\t. (\f g.
                    (\h i.
                         (\j. j h i) =
                         (\k. k ((\d. d) = (\d. d)) ((\d. d) = (\d. d))))
                    f
                    g <=>
                    f)
               (p s = p t)
               (s = t))))
     ((\u. (\f g.
                (\h i.
                     (\j. j h i) =
                     (\k. k ((\d. d) = (\d. d)) ((\d. d) = (\d. d))))
                f
                g <=>
                f)
           u
           ((\b. b = (\c. (\d. d) = (\d. d))) (\d. d)))
     ((\q. q = (\r. (\d. d) = (\d. d)))
     (\v. (\w. (\b. b = (\c. (\d. d) = (\d. d)))
               (\x. (\f g.
                         (\h i.
                              (\j. j h i) =
                              (\k. k ((\d. d) = (\d. d)) ((\d. d) = (\d. d))))
                         f
                         g <=>
                         f)
                    ((\q. q = (\r. (\d. d) = (\d. d)))
                    (\y. (\f g.
                              (\h i.
                                   (\j. j h i) =
                                   (\k. k ((\d. d) = (\d. d))
                                        ((\d. d) = (\d. d))))
                              f
                              g <=>
                              f)
                         (w y)
                         x))
                    x))
          (\z. v = p z)))))
Classical Lemmas N|A
Constructive Lemmas
  • T
  • !f. ONE_ONE f <=> (!x1 x2. f x1 = f x2 ==> x1 = x2)
  • !f. ONTO f <=> (!y. ?x. y = f x)
  • F <=> (!p. p)
  • T <=> (\p. p) = (\p. p)
  • (~) = (\p. p ==> F)
  • (/\) = (\p q. (\f. f p q) = (\f. f T T))
  • (==>) = (\p q. p /\ q <=> p)
  • (!) = (\p. p = (\x. T))
  • (?) = (\p. !q. (!x. p x ==> q) ==> q)
    		•
    Contained Package axiom-infinity
    Comment Standard HOL library retrieved from OpenTheory
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