OAI/GroupTheory/PolycyclicRecognition/Geometry/NormalizedPairHeightTransfer.lean

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Passing bounded height from normalized representatives to coarse maps

  1. theorem OAI.PolycyclicRecognition.uniform_affine_height_of_bounded_pair_representatives line 22

    Source documentation

    Bounded perturbations of both evaluation points cost at most twice the height-Lipschitz constant times the perturbation radius. No continuity of the original coarse maps is used.

    theorem uniform_affine_height_of_bounded_pair_representatives
        (D : SupportDatum W I B₀) (π : G →* Multiplicative W)
        {L : ℝ} (hL : 0 ≤ L)
        (hπ : ∀ x y, ‖(π x).toAdd - (π y).toAdd‖ ≤ L * dist x y)
        {Λ : ℝ≥0} (label : NormalizedPair G Λ → templateSymmetryGroup D)
        {K : ℝ} (hK : 0 ≤ K)
        (hbound : ∀ p x, ‖(π (p.val.1 x)).toAdd - (label p).val (π x).toAdd‖ ≤ K)
        (f : P → G → G) (rep : P → C(G, G) × C(G, G))
        (hrep : ∀ p, LipschitzPairBounds G Λ (rep p))
        {E : ℝ} (hE : 0 ≤ E) (hclose : ∀ p x, dist ((rep p).1 x) (f p x) ≤ E) :
        ∃ (A : P → templateSymmetryGroup D) (B : ℝ), 0 ≤ B ∧ ∀ p x,
          ‖(π (f p x)).toAdd - ((π (f p 1)).toAdd + (A p).val (π x).toAdd)‖ ≤ B := by
    …

    Mentions: OAI.PolycyclicRecognition.SupportDatum, OAI.PolycyclicRecognition.NormalizedPair, OAI.PolycyclicRecognition.templateSymmetryGroup, OAI.PolycyclicRecognition.LipschitzPairBounds