Documentation

Mathlib.RingTheory.RingHom.Etale

Γ‰tale ring homomorphisms #

We show the meta properties of Γ©tale morphisms.

def RingHom.Etale {R : Type u_3} {S : Type u_4} [CommRing R] [CommRing S] (f : R β†’+* S) :

A ring hom R β†’+* S is Γ©tale, if S is an Γ©tale R-algebra.

Equations
    Instances For
      theorem RingHom.Etale.toAlgebra {R : Type u_1} {S : Type u_2} [CommRing R] [CommRing S] {f : R β†’+* S} (hf : f.Etale) :

      Helper lemma for the algebraize tactic

      theorem RingHom.Etale.of_bijective {R : Type u_3} {S : Type u_4} [CommRing R] [CommRing S] {f : R β†’+* S} (hf : Function.Bijective ⇑f) :