linarith [h.almost_smul n g, Int.natAbs_mul n (f g)]
G : Type u_1
inst✝ : AddCommGroup G
f : G → ℤ
bound : ℕ
h : AlmostAdditive f bound
m n : ℤ
g : G
⊢ |f (n • g) - n * f g| + |n * f g| ≤ (bound + |f g|) * |n| + bound
no goals