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Full ring finite N2Row Form exists one le norm

Proved
D1Bound5.full_ring_finiteN2RowForm_exists_one_le_norm

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

diophantine-tuplesnumber-theory

One actual N2 integer row has modulus at least one. Both integrality and nonvanishing are obtained from the displayed polynomial construction.

Preamble
import Mathlib.Algebra.BigOperators.Fin
import Mathlib.Algebra.QuadraticAlgebra.Basic
import Mathlib.Algebra.Ring.Basic
import Mathlib.Algebra.Ring.Equiv
import Mathlib.Analysis.Complex.Norm
import Mathlib.Data.Finset.Card
import Mathlib.Data.Int.GCD
import Mathlib.LinearAlgebra.Dimension.Free
import Mathlib.LinearAlgebra.Matrix.Determinant.Basic
import Mathlib.LinearAlgebra.Matrix.NonsingularInverse
import Mathlib.NumberTheory.NumberField.InfinitePlace.TotallyRealComplex
import Mathlib.NumberTheory.NumberField.Norm
import Mathlib.Tactic.FinCases
import Mathlib.Tactic.Linarith
import Mathlib.Tactic.LinearCombination
import Mathlib.Tactic.NormNum
import Mathlib.Tactic.Ring
import Definitions.Def_D1Bound5_FiniteN2IntegralRows_Definitions

Formal statement
section
open scoped NumberField
open Module

namespace D1Bound5

variable {R S : Type*} [CommRing R] [CommRing S]
















theorem _root_.D1Bound5.full_ring_finiteN2RowForm_exists_one_le_norm
    {K : Type*} [Field K] [NumberField K] [NumberField.IsTotallyComplex K]
    (hK : finrank ℚ K = 2) (phi : K →+* ℂ)
    (x y c z sX sY : 𝓞 K) (hxy : x ≠ y) (hz : z ≠ 0) :
    ∃ i : Fin 3, 1 ≤ ‖finiteN2RowForm (phi (x : K)) (phi (y : K))
      (phi (c : K)) (phi (z : K)) (phi (sX : K)) (phi (sY : K)) i‖ := by sorry

end D1Bound5
end
Source
D1Bound5/FiniteN2IntegralRows.lean, lines 61-91, SHA-256 24e7bcc1d136549034d85c5aaaf506ddde891a0489583b3f2c16180cc599e2b1. Project: https://github.com/tomislav-math/d1-bound5-lean

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