n : Nat
⊢ -↑(succ n) = -[n+1]
n : Nat
⊢ -↑(succ n) = -[1 * n+1]
rw [Nat.one_mul]
no goals
n : Nat
⊢ -↑(succ n) = -[n+1]
rfl
n : Nat
⊢ - -[n+1] = ofNat (succ n)
n : Nat
⊢ - -[n+1] = ofNat (succ 0 * succ n)
rw [Nat.one_mul]
no goals
n : Nat
⊢ - -[n+1] = ofNat (succ n)
rfl