6 lines
171 B
Text
6 lines
171 B
Text
|
definition symm {A : Type} : Π {a b : A}, a = b → b = a,
|
||
|
|
symm rfl := rfl
|
||
|
|
|
||
|
|
definition trans {A : Type} : Π {a b c : A}, a = b → b = c → a = c,
|
||
|
|
trans rfl rfl := rfl
|