English
If f is meromorphic on U, then its normal form on U agrees with f on the complement of U; i.e., outside U the two definitions coincide.
Русский
Если функция f мероморфна на множестве U, то нормальная форма на U совпадает с f за пределами U; то есть вне U две функции совпадают.
LaTeX
$$$\forall x \notin U,\ (toMeromorphicNFOn\ f\ U)(x) = f(x)$$$
Lean4
/-- Conversion to normal form on `U` does not change values outside of `U`.
-/
@[simp]
theorem toMeromorphicNFOn_eq_self_on_compl (hf : MeromorphicOn f U) : Set.EqOn (toMeromorphicNFOn f U) f Uᶜ :=
by
intro x hx
simp_all [toMeromorphicNFOn]