On an `I`-adically complete module, `x ↦ x + r x` is bijective when `r` raises adic order.
ProvedTypeDensity.adic_perturb_bijectivetype-density
On an I-adically complete module, x ↦ x + r x is bijective when r raises adic order.
Preamble
import Definitions.Def_TypeDensity_Basic import Definitions.Def_TypeDensity_Measure_AdicCylinders import Theorems.Thm_TypeDensity_adic_congruence_rules import Theorems.Thm_TypeDensity_adic_perturb_congruence_iff 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 set_option autoImplicit false open TypeDensity open scoped ENNReal
Formal statement
theorem TypeDensity.adic_perturb_bijective (R M : Type) [CommRing R] [AddCommGroup M] [Module R M] (I : Ideal R)
(r : M → M) (hr : RaisesAdicOrder I r) [IsAdicComplete I M] :
Function.Bijective (adicPerturb r) := by sorrySource
TypeDensity/Measure/AdicTransport.lean#L179-L190