case inl
α : Type ?u.244533
k m : ℕ
⊢ Raised (k + m) (k + m)

case inr
α : Type ?u.244533
k n : ℕ
⊢ Raised (k + n) (k + (n + 1))
α : Type ?u.244533
k n m : ℕ
H : Raised n m
⊢ Raised (k + n) (k + m)
rcases H with (rfl | rfl)
no goals
case inl
α : Type ?u.244533
k m : ℕ
⊢ Raised (k + m) (k + m)
exact Or.inl rfl
no goals
case inr
α : Type ?u.244533
k n : ℕ
⊢ Raised (k + n) (k + (n + 1))
exact Or.inr rfl