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Coherent Quotient Form norm le remainder

Proved
D1Bound5.coherentQuotientForm_norm_le_remainder

by tp · Oct 23, 2026 · Mathlib 0df444a (Lean v4.33.1)

diophantine-tuplesnumber-theory

Exact-form norm control before inserting a numerical remainder estimate. This interface is shared by the parameter and four-anchor lemmas.

Preamble
import Mathlib.Algebra.BigOperators.NatAntidiagonal
import Mathlib.Algebra.QuadraticAlgebra.Basic
import Mathlib.Algebra.Ring.Basic
import Mathlib.Algebra.Ring.Equiv
import Mathlib.Analysis.Analytic.Binomial
import Mathlib.Analysis.Complex.Basic
import Mathlib.Analysis.Complex.Norm
import Mathlib.Analysis.Normed.Ring.Basic
import Mathlib.Analysis.SpecificLimits.Normed
import Mathlib.Data.Fin.VecNotation
import Mathlib.Data.Finset.Card
import Mathlib.Data.Finset.Insert
import Mathlib.Data.Int.GCD
import Mathlib.Data.Sym.Basic
import Mathlib.Data.Sym.Card
import Mathlib.LinearAlgebra.Dimension.Free
import Mathlib.LinearAlgebra.Lagrange
import Mathlib.NumberTheory.NumberField.InfinitePlace.TotallyRealComplex
import Mathlib.NumberTheory.NumberField.Norm
import Mathlib.RingTheory.Binomial
import Mathlib.RingTheory.MvPolynomial.Symmetric.Defs
import Mathlib.Tactic.Linarith
import Mathlib.Tactic.LinearCombination
import Definitions.Def_D1Bound5_CoherentFormBounds_Definitions
import Definitions.Def_D1Bound5_CoherentQuotientForms_Definitions

Formal statement
section
open Finset

namespace D1Bound5


theorem _root_.D1Bound5.coherentQuotientForm_norm_le_remainder
    {m : ℕ} (a : Fin m → ℂ) (hm : 2 ≤ m)
    (ha : ∀ i, a i ≠ 0) (hinj : Function.Injective a)
    (Delta p q eta : ℂ) (hDelta : Delta ≠ 0) (heta : eta ≠ 0)
    (hp : ∀ i, ‖p⁻¹*(a i)⁻¹‖ < 1) (hq : ∀ i, ‖q⁻¹*(a i)⁻¹‖ < 1) :
    ‖coherentQuotientForm a Delta p q eta‖ ≤ ‖Delta‖*‖eta‖*
      (‖1-(1+p⁻¹*q⁻¹)^(1/2 : ℂ)‖ + ‖coherentRemainder a p q‖/(∏ i, ‖a i‖)) := by sorry









end D1Bound5
end
Source
D1Bound5/CoherentParameterForms.lean, lines 7-29, SHA-256 374d5b2d6781c171ef752c7123026755c8c7a83017464b5219e1a859229c8703. Project: https://github.com/tomislav-math/d1-bound5-lean

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