9 lines
272 B
Text
9 lines
272 B
Text
|
import standard
|
||
|
|
using num tactic
|
||
|
|
variable p : num → num → num → Bool
|
||
|
|
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
|
||
|
|
:= obtains a b c H [fact], from H1,
|
||
|
|
by (apply exists_intro; apply H2; eassumption)
|