Product Five scalar det upper
ProvedD1Bound5.productFive_scalar_det_upperdiophantine-tuplesnumber-theory
The exact rational determinant margin in the five-entry Schur argument. All four bilinear quantities are complex, with no Hermitian assumptions.
Preamble
import Mathlib.Analysis.CStarAlgebra.Matrix import Mathlib.Analysis.Complex.Basic import Mathlib.Analysis.Complex.Polynomial.Basic import Mathlib.Analysis.InnerProductSpace.PiL2 import Mathlib.Analysis.SpecificLimits.Normed import Mathlib.Data.Complex.Basic import Mathlib.LinearAlgebra.Matrix.Determinant.Basic import Mathlib.LinearAlgebra.Matrix.NonsingularInverse import Mathlib.LinearAlgebra.Matrix.Permutation import Mathlib.LinearAlgebra.Matrix.SchurComplement import Mathlib.Tactic.FieldSimp import Mathlib.Tactic.FinCases import Mathlib.Tactic.Linarith import Mathlib.Tactic.LinearCombination import Mathlib.Tactic.NormNum import Mathlib.Tactic.Ring
Formal statement
section
open Matrix
namespace D1Bound5
theorem _root_.D1Bound5.productFive_scalar_det_upper
(a h p q d : ℂ) (hd : d ≠ 0)
(ha : ‖a‖ ≤ (33/128 : ℝ))
(hh : ‖h/d‖ ≤ (11/108 : ℝ))
(hp : ‖p‖ ≤ (1 : ℝ))
(hq : ‖q/d^2‖ ≤ (8/243 : ℝ))
(hpd : ‖p/d^2‖ ≤ (1/2916 : ℝ)) :
‖a * (1 - 2*h/d + (h^2 - p*q - p)/d^2)‖ < (1/3 : ℝ) := by sorry
end D1Bound5
end
Source
D1Bound5/ProductFiveDetNumeric.lean, lines 8-66, SHA-256 8332341e11d4117d48af2f4f0ac1c61b87c0fa8ae2cf858eab23c5eb17b658fa. Project: https://github.com/tomislav-math/d1-bound5-lean