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Finite N2 rational height

Proved
D1Bound5.finiteN2_rational_height

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

diophantine-tuplesnumber-theory

Actual N2 height at the signed rational pair, valid in every number field. The coefficient certificate is checked before transfer.

Preamble
import Lean.Elab.Tactic.Omega
import Lean.Util.CollectAxioms
import Mathlib.Algebra.BigOperators.Fin
import Mathlib.Algebra.BigOperators.NatAntidiagonal
import Mathlib.Algebra.CharP.Frobenius
import Mathlib.Algebra.CharP.Two
import Mathlib.Algebra.Group.Int.Units
import Mathlib.Algebra.Order.BigOperators.Ring.Finset
import Mathlib.Algebra.Polynomial.Monic
import Mathlib.Algebra.QuadraticAlgebra.Basic
import Mathlib.Algebra.Ring.Basic
import Mathlib.Algebra.Ring.Equiv
import Mathlib.Algebra.Squarefree.Basic
import Mathlib.Analysis.Analytic.Binomial
import Mathlib.Analysis.CStarAlgebra.Matrix
import Mathlib.Analysis.Complex.Basic
import Mathlib.Analysis.Complex.Norm
import Mathlib.Analysis.Complex.Polynomial.Basic
import Mathlib.Analysis.InnerProductSpace.PiL2
import Mathlib.Analysis.Normed.Group.Basic
import Mathlib.Analysis.Normed.Ring.Basic
import Mathlib.Analysis.SpecificLimits.Normed
import Mathlib.Data.Complex.Basic
import Mathlib.Data.Fin.Tuple.Sort
import Mathlib.Data.Fin.VecNotation
import Mathlib.Data.Finset.Card
import Mathlib.Data.Finset.Insert
import Mathlib.Data.Finset.Prod
import Mathlib.Data.Fintype.EquivFin
import Mathlib.Data.Int.GCD
import Mathlib.Data.Int.Interval
import Mathlib.Data.Int.Sqrt
import Mathlib.Data.List.Range
import Mathlib.Data.Real.Basic
import Mathlib.Data.Sym.Basic
import Mathlib.Data.Sym.Card
import Mathlib.Data.ZMod.Basic
import Mathlib.LinearAlgebra.Dimension.Free
import Mathlib.LinearAlgebra.Lagrange
import Mathlib.LinearAlgebra.Matrix.Determinant.Basic
import Mathlib.LinearAlgebra.Matrix.NonsingularInverse
import Mathlib.LinearAlgebra.Matrix.Permutation
import Mathlib.LinearAlgebra.Matrix.SchurComplement
import Mathlib.NumberTheory.NumberField.InfinitePlace.TotallyRealComplex
import Mathlib.NumberTheory.NumberField.Norm
import Mathlib.RingTheory.Binomial
import Mathlib.RingTheory.MvPolynomial.Symmetric.Defs
import Mathlib.Tactic
import Mathlib.Tactic.Convert
import Mathlib.Tactic.FieldSimp
import Mathlib.Tactic.FinCases
import Mathlib.Tactic.GCongr
import Mathlib.Tactic.IntervalCases
import Mathlib.Tactic.Linarith
import Mathlib.Tactic.LinearCombination
import Mathlib.Tactic.NormNum
import Mathlib.Tactic.Positivity
import Mathlib.Tactic.Ring
import Definitions.Def_D1Bound5_Coordinates_Definitions
import Definitions.Def_D1Bound5_FiniteN2Matrix_Definitions
import Definitions.Def_D1Bound5_OneSmallCutoffArithmetic_Definitions_001
import Definitions.Def_D1Bound5_OneSmallCutoffArithmetic_Definitions_002

Formal statement
section
open scoped NumberField

namespace D1Bound5
open QuadInt













theorem _root_.D1Bound5.finiteN2_rational_height
    {K : Type*} [Field K] [NumberField K] (phi : K →+* ℂ)
    (sgn : Bool) (x y c : 𝓞 K)
    (hx : x = if sgn then -1 else 1)
    (hy : y = if sgn then -3 else 3)
    (hC : 1000 ≤ ‖phi (c : K)‖)
    (hCY : 200*‖phi (y : K)‖ ≤ ‖phi (c : K)‖) (i : Fin 3) :
    (101/100 : ℝ)*(‖finiteN2Left (phi (x : K)) (phi (y : K)) (phi (c : K)) i‖+
      ‖finiteN2Right (phi (x : K)) (phi (y : K)) (phi (c : K)) i‖) <
      (oneSmallCutoffRow_56.M2 : ℝ)*‖phi (y : K)‖^4*‖phi (c : K)‖^2 := by sorry











end D1Bound5
end
Source
D1Bound5/RationalCutoffHeights.lean, lines 50-80, SHA-256 887e635eec7648e8edc3fcbe9cbb33e7e5e7ef6738dfaf41dfb1deb286dc6f8f. Project: https://github.com/tomislav-math/d1-bound5-lean

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