case using_lemma => apply h₁.linear_growth_upper_bound_int
G : Type u_1
inst✝ : AddCommGroup G
f₁ : ℤ → ℤ
bound₁ : ℕ
h₁ : AlmostAdditive f₁ bound₁
f₂ : G → ℤ
bound₂ : ℕ
h₂ : AlmostAdditive f₂ bound₂
x y : G
⊢ |f₁ (f₂ (x + y) - f₂ x - f₂ y)| ≤ (bound₁ + |f₁ 1|) * |f₂ (x + y) - f₂ x - f₂ y| + bound₁
no goals