8 lines
266 B
Text
8 lines
266 B
Text
import logic
|
|
open tactic
|
|
variable p : num → num → num → Prop
|
|
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
|
|
:= obtain a b c H [visible], from H1,
|
|
by (apply exists_intro; apply H2; eassumption)
|