For `f` regular modulo `π`, a family that is a basis modulo `π` lifts to an `O`-basis of the curve ring `R/(f)`.
ProvedTypeDensity.concrete_surface_curve_basistype-density
For f regular modulo π, a family that is a basis modulo π lifts to an O-basis of the curve ring R/(f).
Preamble
import Definitions.Def_TypeDensity_Basic import Definitions.Def_TypeDensity_Blowup_Directions import Definitions.Def_TypeDensity_Measure_AdicCylinders import Definitions.Def_TypeDensity_Measure_HenselProducts import Definitions.Def_TypeDensity_Surfaces_Lengths import Definitions.Def_TypeDensity_Unramified_Extension import Definitions.Def_TypeDensity_Blowup_Charts import Definitions.Def_TypeDensity_Formula_LawAlgebra import Definitions.Def_TypeDensity_Surfaces_PowerSeries import Definitions.Def_TypeDensity_Algebra_AlgebraType import Definitions.Def_TypeDensity_Measure_PrimitiveLocus import Definitions.Def_TypeDensity_Algebra_FactorInvariant import Theorems.Thm_TypeDensity_concrete_surface_curve_isAdicComplete import Theorems.Thm_TypeDensity_dvr_isAdicComplete_span_uniformizer import Theorems.Thm_TypeDensity_residue_basis_family_basis import Theorems.Thm_TypeDensity_concrete_surface_pi_regular 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 import Mathlib.FieldTheory.Finite.GaloisField import Mathlib.RingTheory.AdicCompletion.Algebra import Mathlib.Algebra.GroupWithZero.Submonoid.CancelMulZero import Mathlib.Algebra.Module.StablyFree.Basic import Mathlib.NumberTheory.Padics.RingHoms import Mathlib.Algebra.Azumaya.Basic import Mathlib.RingTheory.AdicCompletion.Completeness import Mathlib.RingTheory.AdicCompletion.RingHom import Mathlib.RingTheory.TotallySplit import Mathlib.RingTheory.AdicCompletion.LocalRing import Mathlib.RingTheory.KrullDimension.NonZeroDivisors set_option autoImplicit false open TypeDensity
Formal statement
theorem TypeDensity.concrete_surface_curve_basis (O : Type) [CommRing O] [IsDomain O]
[IsDiscreteValuationRing O] [IsAdicComplete (IsLocalRing.maximalIdeal O) O] (pi : O)
(hpi : Irreducible pi) (u : (TwoSeries O)ˣ) (a b : ℕ) (ha : 0 < a)
(f : ConcreteSurface O pi u a b)
(hf : Function.Injective
(fun w : ConcreteSurface O pi u a b ⧸ Ideal.span
{algebraMap O (ConcreteSurface O pi u a b) pi} => Ideal.Quotient.mk
(Ideal.span {algebraMap O (ConcreteSurface O pi u a b) pi}) f * w)) {N : ℕ}
(β : Fin N → ConcreteSurface O pi u a b)
(hβ : ResidueBasisFamily pi (fun i ↦ Ideal.Quotient.mk (Ideal.span {f}) (β i))) :
∃ B : Module.Basis (Fin N) O (ConcreteSurface O pi u a b ⧸ Ideal.span {f}), ∀ i,
B i = Ideal.Quotient.mk (Ideal.span {f}) (β i) := by sorrySource
TypeDensity/Surfaces/Regularity.lean#L456-L477