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Papers.Rockel2026ExactBlest.ExactBlestBeta

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The unconditional Blest--beta inequality in exact-blest-regions.tex. The certificate below is checked as an exact polynomial identity in each rectangle. No numeric solver or assumed beta-region theorem enters the proof.

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                    theorem Papers.Rockel2026ExactBlest.bernsteinRow_nonneg (a b c d t : ℝ) (ht : t ∈ Set.Icc 0 1) (ha : 0 ≤ a) (hb : 0 ≤ b) (hc : 0 ≤ c) (hd : 0 ≤ d) :
                    0 ≤ bernsteinRow a b c d t
                    theorem Papers.Rockel2026ExactBlest.beta_cell_00 (x z : ℝ) (hx : x ∈ Set.Icc 0 (1 / 6)) (hz : z ∈ Set.Icc 0 (1 / 6)) :
                    0 ≤ betaPhi0 x + betaPsi0 z - x ^ 2 * z
                    theorem Papers.Rockel2026ExactBlest.beta_cell_01 (x z : ℝ) (hx : x ∈ Set.Icc 0 (1 / 6)) (hz : z ∈ Set.Icc (1 / 6) (1 / 2)) :
                    0 ≤ betaPhi0 x + betaPsi1 z - x ^ 2 * z
                    theorem Papers.Rockel2026ExactBlest.beta_cell_02 (x z : ℝ) (hx : x ∈ Set.Icc 0 (1 / 6)) (hz : z ∈ Set.Icc (1 / 2) (5 / 6)) :
                    0 ≤ betaPhi0 x + betaPsi2 z - x ^ 2 * z
                    theorem Papers.Rockel2026ExactBlest.beta_cell_03 (x z : ℝ) (hx : x ∈ Set.Icc 0 (1 / 6)) (hz : z ∈ Set.Icc (5 / 6) 1) :
                    0 ≤ betaPhi0 x + betaPsi3 z - x ^ 2 * z
                    theorem Papers.Rockel2026ExactBlest.beta_cell_10 (x z : ℝ) (hx : x ∈ Set.Icc (1 / 6) (1 / 2)) (hz : z ∈ Set.Icc 0 (1 / 6)) :
                    0 ≤ betaPhi1 x + betaPsi0 z - x ^ 2 * z
                    theorem Papers.Rockel2026ExactBlest.beta_cell_11 (x z : ℝ) (hx : x ∈ Set.Icc (1 / 6) (1 / 2)) (hz : z ∈ Set.Icc (1 / 6) (1 / 2)) :
                    0 ≤ betaPhi1 x + betaPsi1 z - x ^ 2 * z
                    theorem Papers.Rockel2026ExactBlest.beta_cell_12 (x z : ℝ) (hx : x ∈ Set.Icc (1 / 6) (1 / 2)) (hz : z ∈ Set.Icc (1 / 2) (5 / 6)) :
                    0 ≤ betaPhi1 x + betaPsi2 z - x ^ 2 * z
                    theorem Papers.Rockel2026ExactBlest.beta_cell_13 (x z : ℝ) (hx : x ∈ Set.Icc (1 / 6) (1 / 2)) (hz : z ∈ Set.Icc (5 / 6) 1) :
                    0 ≤ betaPhi1 x + betaPsi3 z - x ^ 2 * z
                    theorem Papers.Rockel2026ExactBlest.beta_cell_20 (x z : ℝ) (hx : x ∈ Set.Icc (1 / 2) (5 / 6)) (hz : z ∈ Set.Icc 0 (1 / 6)) :
                    0 ≤ betaPhi2 x + betaPsi0 z - x ^ 2 * z
                    theorem Papers.Rockel2026ExactBlest.beta_cell_21 (x z : ℝ) (hx : x ∈ Set.Icc (1 / 2) (5 / 6)) (hz : z ∈ Set.Icc (1 / 6) (1 / 2)) :
                    0 ≤ betaPhi2 x + betaPsi1 z - x ^ 2 * z
                    theorem Papers.Rockel2026ExactBlest.beta_cell_22 (x z : ℝ) (hx : x ∈ Set.Icc (1 / 2) (5 / 6)) (hz : z ∈ Set.Icc (1 / 2) (5 / 6)) :
                    0 ≤ betaPhi2 x + betaPsi2 z - x ^ 2 * z + 1 / 3
                    theorem Papers.Rockel2026ExactBlest.beta_cell_23 (x z : ℝ) (hx : x ∈ Set.Icc (1 / 2) (5 / 6)) (hz : z ∈ Set.Icc (5 / 6) 1) :
                    0 ≤ betaPhi2 x + betaPsi3 z - x ^ 2 * z + 1 / 3
                    theorem Papers.Rockel2026ExactBlest.beta_cell_30 (x z : ℝ) (hx : x ∈ Set.Icc (5 / 6) 1) (hz : z ∈ Set.Icc 0 (1 / 6)) :
                    0 ≤ betaPhi3 x + betaPsi0 z - x ^ 2 * z
                    theorem Papers.Rockel2026ExactBlest.beta_cell_31 (x z : ℝ) (hx : x ∈ Set.Icc (5 / 6) 1) (hz : z ∈ Set.Icc (1 / 6) (1 / 2)) :
                    0 ≤ betaPhi3 x + betaPsi1 z - x ^ 2 * z
                    theorem Papers.Rockel2026ExactBlest.beta_cell_32 (x z : ℝ) (hx : x ∈ Set.Icc (5 / 6) 1) (hz : z ∈ Set.Icc (1 / 2) (5 / 6)) :
                    0 ≤ betaPhi3 x + betaPsi2 z - x ^ 2 * z + 1 / 3
                    theorem Papers.Rockel2026ExactBlest.beta_cell_33 (x z : ℝ) (hx : x ∈ Set.Icc (5 / 6) 1) (hz : z ∈ Set.Icc (5 / 6) 1) :
                    0 ≤ betaPhi3 x + betaPsi3 z - x ^ 2 * z + 1 / 3
                    noncomputable def Papers.Rockel2026ExactBlest.fourPiece (f0 f1 f2 f3 : ℝ → ℝ) (x : ℝ) :
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                          noncomputable def Papers.Rockel2026ExactBlest.cutValue (f : ℝ → ℝ) (t x : ℝ) :
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                            theorem Papers.Rockel2026ExactBlest.integral_cutValue (f : ℝ → ℝ) (t : ℝ) (ht : t ∈ Set.Icc 0 1) :
                            ∫ (u : ↑unitInterval), cutValue f t ↑u = ∫ (x : ℝ) in 0..t, f x
                            theorem Papers.Rockel2026ExactBlest.fourPiece_decomposition (f0 f1 f2 f3 : ℝ → ℝ) :
                            fourPiece f0 f1 f2 f3 = fun (x : ℝ) => f3 x + cutValue (fun (x : ℝ) => f2 x - f3 x) (5 / 6) x + cutValue (fun (x : ℝ) => f1 x - f2 x) (1 / 2) x + cutValue (fun (x : ℝ) => f0 x - f1 x) (1 / 6) x
                            theorem Papers.Rockel2026ExactBlest.integral_fourPiece (f0 f1 f2 f3 : ℝ → ℝ) (h0 : Continuous f0) (h1 : Continuous f1) (h2 : Continuous f2) (h3 : Continuous f3) :
                            ∫ (u : ↑unitInterval), fourPiece f0 f1 f2 f3 ↑u = (((∫ (u : ↑unitInterval), f3 ↑u) + ∫ (x : ℝ) in 0..5 / 6, f2 x - f3 x) + ∫ (x : ℝ) in 0..1 / 2, f1 x - f2 x) + ∫ (x : ℝ) in 0..1 / 6, f0 x - f1 x
                            theorem Papers.Rockel2026ExactBlest.integrable_fourPiece (C : ProbabilityTheory.Copula 2) (i : Fin 2) (f0 f1 f2 f3 : ℝ → ℝ) (h0 : Continuous f0) (h1 : Continuous f1) (h2 : Continuous f2) (h3 : Continuous f3) :
                            MeasureTheory.Integrable (fun (x : Fin 2 → ↑unitInterval) => fourPiece f0 f1 f2 f3 ↑(x i)) C.toMeasure
                            theorem Papers.Rockel2026ExactBlest.measurable_fourPiece (f0 f1 f2 f3 : ℝ → ℝ) (h0 : Continuous f0) (h1 : Continuous f1) (h2 : Continuous f2) (h3 : Continuous f3) :
                            Measurable fun (u : ↑unitInterval) => fourPiece f0 f1 f2 f3 ↑u
                            theorem Papers.Rockel2026ExactBlest.beta_dual (x z : ℝ) (hx : x ∈ Set.Icc 0 1) (hz : z ∈ Set.Icc 0 1) :
                            x ^ 2 * z - (if 1 / 2 < x ∧ 1 / 2 < z then 1 else 0) / 3 ≤ betaPhi x + betaPsi z
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                              The manuscript's unconditional bound; no exact-region hypothesis is assumed.

                              The upper extremizer P_(1/6), assembled from its three ordinal blocks.