5 lines
190 B
Text
5 lines
190 B
Text
definition symm {A : Type} : Π {a b : A}, a = b → b = a
|
|
| a ⌞a⌟ rfl := rfl
|
|
|
|
definition trans {A : Type} : Π {a b c : A}, a = b → b = c → a = c
|
|
| a ⌞a⌟ ⌞a⌟ rfl rfl := rfl
|