Paired nonparabolic order escape using maximal divisors #
This is the geometric diagonalized-fiber step for the paired maximal-order union. A hypothetical bounded target coordinate is first shown to be nonparabolic. Its trace is then represented by a non-two-torsion element of a maximal candidate subgroup, exactly the kind of witness excluded by the paired finite escape theorem.
theorem
BGS.Markoff.exists_iterate_with_larger_secondRotationOrder_of_diagonalizedFiber_pairedMaximalOrders
(p : ℕ)
[Fact (Nat.Prime p)]
(hpTwo : p ≠ 2)
(delta : ℝ)
(hdelta : delta ≤ 1 / 2)
(x : NormalizedPoint (ZMod p))
(w s : (quadraticFiniteField p)ˣ)
(hw : ↑w ^ 2 ≠ 1)
(hpoint : algebraMapNormalizedPoint p x = splitFiberPoint w s)
(hadmissible : WeightedTraceCurveIsCorvajaZannierAdmissible (↑s) (splitFiberProduct w * ↑s⁻¹))
(hbelowEndgame : ↑(rotationOrder x.u1) < ↑p ^ (1 / 2 + delta))
(hcube : (6 * (middleGameMaximalOrders p (rotationOrder x.u1)).card) ^ 3 < rotationOrder x.u1)
(hlinear : 24 * (middleGameMaximalOrders p (rotationOrder x.u1)).card * rotationOrder x.u1 < p)
:
∃ (n : ℕ), rotationOrder x.u1 < rotationOrder (normalizedRotate1^[n] x).u2
Complete order escape from a diagonalized fiber under the paired
coefficient conditions (6*K)^3 < currentOrder and
24*K*currentOrder < p.