SinTan1729/comm_alg
1
0
Fork 0
mirror of https://github.com/GTBarkley/comm_alg.git synced 2024-12-26 07:38:36 -06:00
Code Issues Projects Releases Packages Wiki Activity

Merge pull request #74 from ssavkar1/main

Browse source 
Implemented FieldisArtinian lemma
This commit is contained in:
ssavkar1 2023-06-15 10:28:00 -07:00 committed by GitHub
commit a75dadccd1
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 14 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

16
CommAlg/sameer(artinian-rings).lean
View file

@ -7,9 +7,19 @@ import Mathlib.RingTheory.DedekindDomain.DVR
lemma FieldisArtinian (R : Type _) [CommRing R] (h : IsField R) :
IsArtinianRing R := by sorry
IsArtinianRing R := by
let inst := h.toField
rw [isArtinianRing_iff, isArtinian_iff_wellFounded]
apply WellFounded.intro
intro I
constructor
intro J hJI
constructor
intro K hKJ
exfalso
rcases Ideal.eq_bot_or_top J with rfl | rfl
. exact not_lt_bot hKJ
. exact not_top_lt hJI
lemma ArtinianDomainIsField (R : Type _) [CommRing R] [IsDomain R]
(IsArt : IsArtinianRing R) : IsField (R) := by