The quotient of an `I`-adically complete ring by an `I`-closed ideal `J` is complete for the image of `I`.
ProvedTypeDensity.isAdicComplete_quotient_of_iInf_sup_powtype-density
The quotient of an I-adically complete ring by an I-closed ideal J is complete for the image of I.
Preamble
import Definitions.Def_TypeDensity_Basic import Definitions.Def_TypeDensity_Measure_AdicCylinders import Definitions.Def_TypeDensity_Measure_HenselProducts import Definitions.Def_TypeDensity_Surfaces_Lengths import Mathlib.FieldTheory.RatFunc.Basic import Mathlib.MeasureTheory.Measure.Haar.Unique import Mathlib.NumberTheory.ArithmeticFunction.Moebius import Mathlib.NumberTheory.Padics.PadicIntegers import Mathlib.RingTheory.IntegralClosure.IntegralRestrict import Mathlib.RingTheory.MvPowerSeries.Basic import Mathlib.RingTheory.RamificationInertia.Basic import Mathlib.Topology.Algebra.Nonarchimedean.AdicTopology import Mathlib.Topology.Algebra.MvPolynomial import Mathlib.Algebra.Group.Pi.Units import Mathlib.Order.CompletePartialOrder import Mathlib.RingTheory.Henselian import Mathlib.RingTheory.Polynomial.Resultant.Basic import Mathlib.RingTheory.RegularLocalRing.Defs import Mathlib.RingTheory.SimpleRing.Principal import Mathlib.FieldTheory.Finite.Extension import Mathlib.RingTheory.AdicCompletion.Noetherian import Mathlib.RingTheory.MvPowerSeries.Equiv import Mathlib.RingTheory.PicardGroup set_option autoImplicit false open TypeDensity
Formal statement
theorem TypeDensity.isAdicComplete_quotient_of_iInf_sup_pow (S : Type) [CommRing S] (I J : Ideal S)
[IsAdicComplete I S] (hJ : (⨅ n : ℕ, J ⊔ I ^ n) = J) :
IsAdicComplete (I.map (Ideal.Quotient.mk J)) (S ⧸ J) := by sorrySource
TypeDensity/Surfaces/Lengths.lean#L1081-L1133