OAI/GroupTheory/PolycyclicRecognition/Analysis/ProfileCompactness.lean

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Compact containment for families of chart profiles

  1. theorem OAI.PolycyclicRecognition.exists_compact_containing_profiles line 18

    Source documentation

    Equicontinuous profiles with pointwise bounded values lie in one compact set for locally uniform convergence. The domain need not itself be compact.

    theorem exists_compact_containing_profiles
        (F : I → C(X, W)) (hequi : Equicontinuous (fun i x => F i x))
        (w₀ : W) (hbound : ∀ x, ∃ R : ℝ, ∀ i, dist (F i x) w₀ ≤ R) :
        ∃ S : Set C(X, W), IsCompact S ∧ ∀ i, F i ∈ S := by
    …