rewrite [show Int.negSucc Nat.zero = -1 by rfl]
G : Type u_1
inst✝ : AddCommGroup G
f : G → ℤ
bound : ℕ
h : AlmostAdditive f bound
n : ℤ
g : G
⊢ |f (Int.negSucc Nat.zero • g) - Int.negSucc Nat.zero * f g| ≤ bound * (|Int.negSucc Nat.zero| + 1)
G : Type u_1
inst✝ : AddCommGroup G
f : G → ℤ
bound : ℕ
h : AlmostAdditive f bound
n : ℤ
g : G
⊢ |f (-1 • g) - -1 * f g| ≤ bound * (|-1| + 1)