English
The image of irreducible sets under vanishingIdeal equals the set of prime ideals.
Русский
Образ ирредуцируемых подмножеств по vanishingIdeal совпадает с множеством простых идеалов.
LaTeX
$$$\\operatorname{vanishingIdeal}\\bigl(\\operatorname{image}(\\operatorname{PrimeSpectrum}, \\{s \\mid \\mathrm{IsIrreducible}(s)\\})\\bigr) = \\{P \\mid PIsPrime\\}$$$
Lean4
theorem vanishingIdeal_isIrreducible : vanishingIdeal (R := R) '' {s | IsIrreducible s} = {P | P.IsPrime} :=
Set.ext fun I ↦
⟨fun ⟨_, hs, e⟩ ↦ e ▸ isIrreducible_iff_vanishingIdeal_isPrime.mp hs, fun h ↦
⟨zeroLocus I, (isIrreducible_zeroLocus_iff_of_radical _ h.isRadical).mpr h,
(vanishingIdeal_zeroLocus_eq_radical I).trans h.radical⟩⟩