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Is D1Tuple — finite A5 inequality

Proved
D1Bound5.IsD1Tuple.finiteA5_inequality

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

diophantine-tuplesnumber-theory

The A5 family on any actual four-entry subtuple. The matrix uses the unequal pole orders specified in the article.

Preamble
import Lean.Elab.Tactic.Omega
import Mathlib.Algebra.BigOperators.Fin
import Mathlib.Algebra.BigOperators.Group.Finset.Sigma
import Mathlib.Algebra.BigOperators.NatAntidiagonal
import Mathlib.Algebra.CharZero.Infinite
import Mathlib.Algebra.Polynomial.BigOperators
import Mathlib.Algebra.Polynomial.Degree.Operations
import Mathlib.Algebra.Polynomial.Div
import Mathlib.Algebra.Polynomial.PartialFractions
import Mathlib.Algebra.Polynomial.Reverse
import Mathlib.Algebra.Polynomial.RingDivision
import Mathlib.Algebra.Polynomial.Roots
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.Normed.Ring.InfiniteSum
import Mathlib.Analysis.SpecialFunctions.Gaussian.GaussianIntegral
import Mathlib.Analysis.SpecialFunctions.Pow.Real
import Mathlib.Analysis.SpecificLimits.Normed
import Mathlib.Combinatorics.Enumerative.Catalan.Basic
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.LinearAlgebra.Matrix.Determinant.Basic
import Mathlib.LinearAlgebra.Matrix.NonsingularInverse
import Mathlib.LinearAlgebra.Matrix.Polynomial
import Mathlib.NumberTheory.NumberField.InfinitePlace.TotallyRealComplex
import Mathlib.NumberTheory.NumberField.Norm
import Mathlib.RingTheory.Binomial
import Mathlib.RingTheory.MvPolynomial.Symmetric.Defs
import Mathlib.RingTheory.PowerSeries.Binomial
import Mathlib.RingTheory.PowerSeries.Trunc
import Mathlib.Tactic
import Mathlib.Tactic.Convert
import Mathlib.Tactic.FieldSimp
import Mathlib.Tactic.FinCases
import Mathlib.Tactic.GCongr
import Mathlib.Tactic.Linarith
import Mathlib.Tactic.LinearCombination
import Mathlib.Tactic.NormNum
import Mathlib.Tactic.Positivity
import Mathlib.Tactic.Ring
import Definitions.Def_D1Bound5_IsD1Tuple

Formal statement
section
open scoped NumberField
open Module

namespace D1Bound5


theorem _root_.D1Bound5.IsD1Tuple.finiteA5_inequality
    {K : Type*} [Field K] [NumberField K] [NumberField.IsTotallyComplex K]
    (hK : finrank ℚ K = 2) (phi : K →+* ℂ)
    (t : Fin 4 → 𝓞 K) (ht : IsD1Tuple t)
    (hXY : ‖phi (t 0 : K)‖ ≤ ‖phi (t 1 : K)‖)
    (hXC : 1000 ≤ ‖phi (t 0 : K)‖*‖phi (t 2 : K)‖)
    (hC : 200*‖phi (t 1 : K)‖ ≤ ‖phi (t 2 : K)‖) :
    ∃ z : 𝓞 K, z^2=t 2*t 3+1 ∧
      1 < 3113013*‖phi (t 1 : K)‖^12*‖phi (t 2 : K)‖^6/‖phi (z : K)‖ +
        (495/64 : ℝ)*‖phi (t 1 : K)‖^5*‖phi (z : K)‖/
          (‖phi (t 0 : K)‖^6*‖phi (t 2 : K)‖^9) := by sorry



end D1Bound5
end
Source
D1Bound5/FiniteA5Interval.lean, lines 9-33, SHA-256 7c480f02b242d1351f6ce77e68792a0f2857b694eab69bf511843e090929a61f. Project: https://github.com/tomislav-math/d1-bound5-lean

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