OAI/GroupTheory/PolycyclicRecognition/Analysis/MinimizingMetricChains.lean

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Metric chains supplied by the chosen minimizing paths

  1. def OAI.PolycyclicRecognition.linearMetricChains_of_minimizing_paths line 15

    Source documentation

    Sampling the chosen minimizing paths gives the concrete chain witnesses needed by the canonical-height and proper-homomorphism metric bridges.

    def linearMetricChains_of_minimizing_paths
        {G : Type*} [Group G] [MetricSpace G] [IsIsometricSMul G G]
        (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|) :
        LinearMetricChains G := by
    …