Distinct Frobenius conjugates of the monic polynomial of a block are coprime over the fraction field of `O[X]/(Φ)`.
ProvedTypeDensity.block_conjugates_coprimetype-density
Distinct Frobenius conjugates of the monic polynomial of a block are coprime over the fraction field of O[X]/(Φ).
Preamble
import Definitions.Def_TypeDensity_Basic import Definitions.Def_TypeDensity_Formula_LawAlgebra import Definitions.Def_TypeDensity_Algebra_AlgebraType import Definitions.Def_TypeDensity_Measure_AdicCylinders import Definitions.Def_TypeDensity_Measure_HenselProducts import Definitions.Def_TypeDensity_Unramified_Extension import Definitions.Def_TypeDensity_Measure_PrimitiveLocus import Definitions.Def_TypeDensity_Algebra_FactorInvariant import Theorems.Thm_TypeDensity_coprime_of_coprime_residue_dvr import Theorems.Thm_TypeDensity_monic_poly_reconstruct import Theorems.Thm_TypeDensity_unramified_is_dvr import Theorems.Thm_TypeDensity_map_frobeniusIter_baseReduce import Theorems.Thm_TypeDensity_conjugate_roots_distinct 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.FieldTheory.Finite.GaloisField import Mathlib.RingTheory.AdicCompletion.Algebra import Mathlib.RingTheory.RegularLocalRing.Defs import Mathlib.RingTheory.Henselian import Mathlib.Topology.Algebra.MvPolynomial import Mathlib.Algebra.Group.Pi.Units import Mathlib.Order.CompletePartialOrder import Mathlib.RingTheory.Polynomial.Resultant.Basic import Mathlib.RingTheory.SimpleRing.Principal import Mathlib.Algebra.GroupWithZero.Submonoid.CancelMulZero import Mathlib.Algebra.Module.StablyFree.Basic import Mathlib.NumberTheory.Padics.RingHoms set_option autoImplicit false open TypeDensity open scoped BigOperators ENNReal
Formal statement
theorem TypeDensity.block_conjugates_coprime (O : Type) [CommRing O] [IsDomain O]
[IsDiscreteValuationRing O] [IsAdicComplete (IsLocalRing.maximalIdeal O) O]
[Finite (IsLocalRing.ResidueField O)] (Φ : Polynomial O) (hΦ : IsUnramifiedLift O Φ)
[IsDomain (AdjoinRoot Φ)] (r : ℕ) (b : Fin r → AdjoinRoot Φ) (hb : b ∈ blockCell O Φ r) :
∀ i j : Fin Φ.natDegree, i ≠ j →
IsCoprime (((monicPolyO b).map (frobeniusIter O Φ i).toRingHom).map
(algebraMap (AdjoinRoot Φ) (BaseField (AdjoinRoot Φ))))
(((monicPolyO b).map (frobeniusIter O Φ j).toRingHom).map
(algebraMap (AdjoinRoot Φ) (BaseField (AdjoinRoot Φ)))) := by sorrySource
TypeDensity/Unramified/FrobeniusDescent.lean#L930-L947