English
If hf : LocallyLipschitz f and hg : LocallyLipschitz g, then the division f/g is LocallyLipschitz.
Русский
Если f и g локально липшицевы, то f/g локально липшицево.
LaTeX
$$$\\mathrm{LocallyLipschitz}\\ f \\land \\mathrm{LocallyLipschitz}\\ g \\Rightarrow \\mathrm{LocallyLipschitz}\\ (\\lambda x. f(x)/g(x)).$$$
Lean4
@[to_additive]
theorem div (hf : LocallyLipschitz f) (hg : LocallyLipschitz g) : LocallyLipschitz fun x ↦ f x / g x := by
simpa only [div_eq_mul_inv] using hf.mul hg.inv