English
The space α →ᵇ β is a 𝕜–module with IsBoundedSMul, i.e., the scalar action is compatible with the metric structure and the sup-norm bounds behave well under scaling.
Русский
Пространство α →ᵇ β образует модуль над 𝕜 с условием IsBoundedSMul: скалярное умножение совместимо с метрической структурой и пределы по норме сохраняются под масштабированием.
LaTeX
$$$IsBoundedSMul_{\\mathbb{K}}(\\alpha \\to^{\\mathrm{b}} \\beta)$$$
Lean4
instance instIsBoundedSMul : IsBoundedSMul 𝕜 (α →ᵇ β)
where
dist_smul_pair' c f₁
f₂ := by
rw [dist_le (mul_nonneg dist_nonneg dist_nonneg)]
intro x
refine (dist_smul_pair c (f₁ x) (f₂ x)).trans ?_
gcongr
apply dist_coe_le_dist
dist_pair_smul' c₁ c₂
f := by
rw [dist_le (by positivity)]
intro x
refine (dist_pair_smul c₁ c₂ (f x)).trans ?_
gcongr
apply dist_coe_le_dist (g := 0)