English
The underlying map of the built NormedAddGroupHom from a general additive monoid hom f and a bound C is f.
Русский
Базовая карта построенного NormedAddGroupHom из общей аддитивной монойд-гомоморфизм f и константы C равна f.
LaTeX
$$$\\forall (f:\\ V_1 \\to V_2)\\; (C:\\ Real)\\; (hC) : \\; \\text{coeff}(\\,f.mkNormedAddGroupHom C hC\\,)=f$$$
Lean4
theorem exists_pos {f : NormedAddGroupHom V₁ V₂} {K : AddSubgroup V₂} {C : ℝ} (h : f.SurjectiveOnWith K C) :
∃ C' > 0, f.SurjectiveOnWith K C' := by
refine ⟨|C| + 1, ?_, ?_⟩
· linarith [abs_nonneg C]
· apply h.mono
linarith [le_abs_self C]