OAI/Analysis/KadisonSimilarity/Derivation/DerivationEndgame.lean

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Derivation implementation and quantitative hyperreflexivity follow from the uniform commutator estimate.

  1. theorem OAI.KadisonSimilarity.derivation_inner_of_finite_columns line 20

    Source documentation

    Finite cyclic column implementers, uniform commutator control and Paulsen similarity give an implementer for the whole derivation.

    theorem derivation_inner_of_finite_columns {l : Filter I} [l.NeBot]
        (σ : A →⋆ₐ[ℂ] (H →L[ℂ] H)) (δ : A →L[ℂ] (H →L[ℂ] H))
        (hδ : ∀ a b, δ (a * b) = (σ a).comp (δ b) + (δ a).comp (σ b))
        (P : VonNeumannAlgebra H) (hP : ∀ a, σ a ∈ P)
        (kaplansky : TwoVectorKaplanskyInput σ P)
        (columns : FiniteColumnImplementers σ δ l)
        {C : ℝ} (hC : 0 ≤ C) (estimate : CommutatorEstimate P C)
        (paulsen : PaulsenSimilarityInput (normalizedRectangularRepresentation σ σ δ hδ)) :
        ∃ V : H →L[ℂ] H, ∀ a, δ a = V.comp (σ a) - (σ a).comp V := by
    …

    Mentions: OAI.KadisonSimilarity.TwoVectorKaplanskyInput, OAI.KadisonSimilarity.FiniteColumnImplementers, OAI.KadisonSimilarity.CommutatorEstimate, OAI.KadisonSimilarity.PaulsenSimilarityInput, OAI.KadisonSimilarity.normalizedRectangularRepresentation

  2. theorem OAI.KadisonSimilarity.universalHyperreflexivity_of_uniformCommutator line 40

    Source documentation

    The uniform commutator theorem implies quantitative hyperreflexivity using spectral step approximation and Arveson's distance formula.

    theorem universalHyperreflexivity_of_uniformCommutator
        {C : ℝ} (hC : 0 ≤ C) (estimate : UniformCommutatorEstimate.{u} C)
        (spectral : ∀ (K : Type u) [NormedAddCommGroup K] [InnerProductSpace ℂ K]
          [CompleteSpace K] (M : VonNeumannAlgebra K), SpectralStepApproximation M.commutant)
        (arveson : ∀ (K : Type u) [NormedAddCommGroup K] [InnerProductSpace ℂ K]
          [CompleteSpace K] (M : VonNeumannAlgebra K) (T : K →L[ℂ] K), ArvesonDistanceFormula M T) :
        UniversalHyperreflexivity.{u} C := by
    …

    Mentions: OAI.KadisonSimilarity.SpectralStepApproximation, OAI.KadisonSimilarity.ArvesonDistanceFormula