English
Applying the p-th Frobenius map n times to the element mk(K,p)(⟨n,x⟩) yields the image of x under the embedding.
Русский
Применение p-й итерации Фробениуса к элементу mk(K,p)(⟨n,x⟩) даёт образ x через встроение.
LaTeX
$$$(\mathrm{frobenius}(\mathrm{PerfectClosure}(K,p),p))^{[n]}(\mathrm{mk}(K,p)\langle n,x\rangle)=\mathrm{of}(K,p)(x).$$$
Lean4
@[simp]
theorem iterate_frobenius_mk (n : ℕ) (x : K) : (frobenius (PerfectClosure K p) p)^[n] (mk K p ⟨n, x⟩) = of K p x := by
induction n with
| zero => rfl
| succ n ih => rw [iterate_succ_apply, ← ih, frobenius_mk, mk_succ_pow]