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Unit Pair Arithmetic Model — imaginary same axis impossible

Proved
D1Bound5.UnitPairArithmeticModel.imaginary_same_axis_impossible

by tp · Oct 24, 2026 · Mathlib 0df444a (Lean v4.33.1)

diophantine-tuplesnumber-theory

Two purely imaginary extensions on the same half-axis cannot be compatible: their negative square would make the field parameter divide 1.

Preamble
import Lean.Elab.Tactic.Omega
import Mathlib.Algebra.Group.Int.Units
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.Complex.Norm
import Mathlib.Data.Finset.Card
import Mathlib.Data.Fintype.EquivFin
import Mathlib.Data.Int.GCD
import Mathlib.Data.Int.Sqrt
import Mathlib.LinearAlgebra.Dimension.Free
import Mathlib.NumberTheory.NumberField.InfinitePlace.TotallyRealComplex
import Mathlib.NumberTheory.NumberField.Norm
import Mathlib.Tactic.GCongr
import Mathlib.Tactic.IntervalCases
import Mathlib.Tactic.Linarith
import Mathlib.Tactic.LinearCombination
import Mathlib.Tactic.NormNum
import Mathlib.Tactic.Ring
import Definitions.Def_D1Bound5_UnitPairArithmeticModel_Definitions

Formal statement
section
open scoped NumberField QuadraticAlgebra
open Module

namespace D1Bound5












theorem _root_.D1Bound5.UnitPairArithmeticModel.imaginary_same_axis_impossible
    {R : Type*} [CommRing R] (M : UnitPairArithmeticModel R)
    (hd : 2 ≤ M.d) (m n : ℤ) (hmn : 0 < m*n)
    (hs : ∃ r : R, r*r = ((m : R)*M.w)*((n : R)*M.w)+1) : False := by sorry



end D1Bound5
end
Source
D1Bound5/UnitPairArithmeticModel.lean, lines 108-126, SHA-256 31a0d8a0d8b8fb8a155f4aa1757650bb63a56b886b27a1d3631ee72dcc025fb7. Project: https://github.com/tomislav-math/d1-bound5-lean

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