2014-07-11 03:08:51 +00:00
|
|
|
import standard
|
|
|
|
|
using num
|
2014-07-22 16:43:18 +00:00
|
|
|
variable p : num → num → num → Prop
|
2014-07-11 03:08:51 +00:00
|
|
|
axiom H1 : ∃ x y z, p x y z
|
|
|
|
|
axiom H2 : ∀ {x y z : num}, p x y z → p x x x
|
|
|
|
|
theorem tst : ∃ x, p x x x
|
2014-07-12 05:35:24 +00:00
|
|
|
:= obtain a b c H, from H1, exists_intro a (H2 H)
|
