10 lines
378 B
Text
10 lines
378 B
Text
Set: pp::colors
|
||
Set: pp::unicode
|
||
Imported 'Int'
|
||
Assumed: f
|
||
Proved: T1
|
||
Proved: T2
|
||
theorem T1 (a b c : ℤ) (H1 : a = b) (H2 : a = c) : f (f a a) b = f (f b c) a :=
|
||
congr (congr (refl f) (congr (congr (refl f) H1) H2)) (symm H1)
|
||
theorem T2 (a b c : ℤ) (H1 : a = b) (H2 : a = c) : f (f a c) = f (f b a) :=
|
||
congr (refl f) (congr (congr (refl f) H1) (symm H2))
|