Entry
Value
Name
list_cases
Conclusion
!l. l = [] \/ (?h t. l = CONS h t)
Constructive Proof
Yes
Axiom
N|A
Classical Lemmas
N|A
Constructive Lemmas
T
!x. x = x
!p1 p2 q1 q2. (p1 ==> p2) /\ (q1 ==> q2) ==> p1 /\ q1 ==> p2 /\ q2
!p1 p2 q1 q2. (p1 ==> p2) /\ (q1 ==> q2) ==> p1 \/ q1 ==> p2 \/ q2
!f y. (\x. f x) y = f y
!p q. (!x. p x ==> q x) ==> (?x. p x) ==> (?x. q x)
!p. p [] /\ (!h t. p t ==> p (CONS h t)) ==> (!l. p l)
T <=> (\p. p) = (\p. p)
(/\) = (\p q. (\f. f p q) = (\f. f T T))
(==>) = (\p q. p /\ q <=> p)
(\/) = (\p q. !r. (p ==> r) ==> (q ==> r) ==> r)
(!) = (\p. p = (\x. T))
(?) = (\p. !q. (!x. p x ==> q) ==> q)
Contained Package
list-thm
Comment
Standard HOL library retrieved from OpenTheory
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