English
If f is meromorphic at x, then f^n is meromorphic at x for any natural n.
Русский
Если f мероморфна в x, то f^n мероморфна в x для любого натурального n.
LaTeX
$$$MeromorphicAt f x \\to MeromorphicAt (f^n) x$$$
Lean4
@[fun_prop]
theorem pow {f : 𝕜 → 𝕜} {x : 𝕜} (hf : MeromorphicAt f x) (n : ℕ) : MeromorphicAt (f ^ n) x := by
induction n with
| zero => simpa only [pow_zero] using MeromorphicAt.const 1 x
| succ m hm => simpa only [pow_succ] using hm.mul hf