9 lines
171 B
Text
9 lines
171 B
Text
import logic
|
|
namespace experiment
|
|
inductive nat : Type :=
|
|
| zero : nat
|
|
| succ : nat → nat
|
|
|
|
definition is_zero (n : nat)
|
|
:= nat.rec true (λ n r, false) n
|
|
end experiment
|