The descent of a block lies in the residue cell of `residuePoly Φ ^ r`, and its monic polynomial lifts to the conjugate product of the block.
ProvedTypeDensity.descend_block_mem_celltype-density
The descent of a block lies in the residue cell of residuePoly Φ ^ r, and its monic polynomial lifts to the conjugate product of the block.
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_monic_poly_reconstruct import Theorems.Thm_TypeDensity_frobenius_residue_action import Theorems.Thm_TypeDensity_frobenius_fixed_ring import Theorems.Thm_TypeDensity_frobenius_pow_degree_eq_id import Theorems.Thm_TypeDensity_unramified_is_domain 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.descend_block_mem_cell (O : Type) [CommRing O] [IsDomain O] [IsDiscreteValuationRing O]
[IsAdicComplete (IsLocalRing.maximalIdeal O) O] [Finite (IsLocalRing.ResidueField O)]
(Φ : Polynomial O) (hΦ : IsUnramifiedLift O Φ) (r : ℕ) (b : Fin r → AdjoinRoot Φ)
(hb : b ∈ blockCell O Φ r) :
descendBlock O Φ r b ∈ residueCell O (Φ.natDegree * r) (residuePoly O Φ ^ r) ∧
(monicPolyO (descendBlock O Φ r b)).map (AdjoinRoot.of Φ) =
conjugateProduct O Φ (monicPolyO b) := by sorrySource
TypeDensity/Unramified/FrobeniusDescent.lean#L759-L799