English
For any unit x in the torsion subgroup, the torsion map quotient evaluated at x corresponds to the quotient map: it sends x to the class of x modulo I.
Русский
Для любого элемента-разветвления из torsion отображение torsionMapQuot применимо к x и даёт класс x в фактор-модуле I.
LaTeX
$$$\\operatorname{torsionMapQuot}(I)(\\langle x, \\! x\\in\\mathrm{torsion} K\\rangle) = \\mathrm{Ideal}.Quotient.mk(I)\\, x$$$
Lean4
@[simp]
theorem torsionMapQuot_apply {x : (𝓞 K)ˣ} (hx : x ∈ torsion K) : torsionMapQuot I ⟨x, hx⟩ = Ideal.Quotient.mk I x :=
rfl