OAI/Analysis/KadisonSimilarity/FreeProduct/ConcreteHaarDischarge.lean

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The precise diffuse-corner Haar input used by the free-corner argument is supplied by the constructed dyadic unitary.

  1. theorem OAI.KadisonSimilarity.thielDiffuseCornerHaarInput line 20
  2. theorem OAI.KadisonSimilarity.exists_concreteSmallFreeCornerData_of_diffuse line 29

    Source documentation

    A diffuse concrete source supplies the small corner, containing half projection and Haar unitary with no independent Haar existence premise.

    theorem exists_concreteSmallFreeCornerData_of_diffuse
        (τ : TracialRepresentation N)
        (hdiff : ∀ p : N.toStarSubalgebra, IsStarProjection p → p ≠ 0 →
          ∃ q : N.toStarSubalgebra, IsStarProjection q ∧ q ≠ 0 ∧ q ≠ p ∧
            p * q = q ∧ q * p = q)
        {I : ℕ → Type*} [∀ j, Fintype (I j)] [∀ j, DecidableEq (I j)]
        [∀ j, Nonempty (I j)]
        (V : N.toStarSubalgebra →ₗ[ℂ] H)
        (M : NestedTracialMatrices (A := I) (concreteTraceLinear τ) V)
    …

    Mentions: OAI.KadisonSimilarity.NestedTracialMatrices, OAI.KadisonSimilarity.concreteTraceLinear