Ideals_Containing_Ideal_Isomorphic_to_Quotient_Ring
Provedidealsproofwikiquotient-ringring-theory
Let be an ideal of a ring . Let be the set of all ideals of which contain . Let the ordered set be the set of all ideals of . Let the mapping be defined as where is the quotient epimorphism from to from the definition of quotient ring. Then is an isomorphism.
Preamble
import Mathlib.Analysis.Complex.Basic import Mathlib.RingTheory.Ideal.Quotient.Basic
Formal statement
theorem Ideals_Containing_Ideal_Isomorphic_to_Quotient_Ring {R : Type _} [CommRing R] (J I : Ideal R) (h : J ≤ I) : ∃ I' : Ideal (R ⧸ J), I' = Ideal.map (Ideal.Quotient.mk J) I := by sorrySource