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Full ring finite A5Row Form exists one le norm

Proved
D1Bound5.full_ring_finiteA5RowForm_exists_one_le_norm

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

diophantine-tuplesnumber-theory

One actual A5 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
import Mathlib.Tactic.Linarith
import Mathlib.Tactic.LinearCombination
import Definitions.Def_D1Bound5_FiniteA5IntegralRows_Definitions

Formal statement
section
open scoped NumberField
open Module

namespace D1Bound5

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
















theorem _root_.D1Bound5.full_ring_finiteA5RowForm_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) (hx : x ≠ 0) (hy : y ≠ 0) (hc : c ≠ 0) (hxy : x ≠ y) (hz : z ≠ 0) :
    ∃ i : Fin 3, 1 ≤ ‖finiteA5RowForm (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/FiniteA5IntegralRows.lean, lines 61-96, SHA-256 135a11e7f96cd3ffa5b3aba636da84c37adec2ecbaa3d92a22ae8fb4a3140799. Project: https://github.com/tomislav-math/d1-bound5-lean

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