OAI/GroupTheory/PolycyclicRecognition/Geometry/CartanIntrinsicBridge.lean

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Bridge absorption using the actual finite Dynkin expansion

  1. theorem OAI.PolycyclicRecognition.CartanWordModel.exists_sequence_intrinsic_bridge_lifts line 38

    Source documentation

    The published finite Dynkin identity supplies the bridge polynomial.

    theorem exists_sequence_intrinsic_bridge_lifts
        (b₀ : Basis (Fin (finrank ℝ (cartanRootIdeal H))) ℝ (cartanRootIdeal H))
        (γ₀ : M.Bases) {cell : Set (F.N.carrier × F.D.carrier)} (hcell : IsCompact cell)
        (hφ : ∀ d, F.action d = M.adjointGroupAutomorphism T F.N.equiv F.ExpN F.isExpN
          hbijN dynkinN
          (cartanLog H F.D.equiv F.ExpD
            hbijD d))
        (hpath : ∀ g : G, ∃ γ : ℝ → G, γ 0 = 1 ∧ γ 1 = g ∧
          ∀ t ∈ Icc (0 : ℝ) 1, ∀ u ∈ Icc (0 : ℝ) 1,
            dist (γ t) (γ u) ≤ dist 1 g * |t - u|)
        {Kπ : ℝ} (hKπ : 0 ≤ Kπ)
        (hLip : ∀ x y, ‖(π x).toAdd - (π y).toAdd‖ ≤ Kπ * dist x y)
    …

    Mentions: OAI.PolycyclicRecognition.cartanRootIdeal, OAI.PolycyclicRecognition.cartanLog