OAI/Analysis/KadisonKastler/RegularCoreModulus.lean

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A uniform tolerance for regular-core descent

The tolerance is obtained from the proved continuous error functions at zero. It is chosen before the Hilbert space, the algebras, and the modular action. Both the original-space gap and the regular tensor gap remain explicit.

  1. theorem OAI.KadisonKastler.exists_regularCore_tolerance line 22

    Source documentation

    One positive tolerance satisfies every numerical requirement of the regular-core descent and the prescribed final displacement.

    theorem exists_regularCore_tolerance {ε : ℝ} (hε : 0 < ε) :
        ∃ t : ℝ, 0 < t ∧
          302 * t < 1 / 100 ∧
          302 * (302 * t) < 174 / 1000000000000000 ∧
          3 * 50948 * Real.sqrt (302 * (302 * t)) < 1 / 100000 ∧
          commonPositionError (302 * (302 * t)) < 1 / 4000000 ∧
          2 * matrixCornerError t < 1 / 1000 ∧
          t + 2 * matrixCornerError t < 1 ∧
          256 * matrixCornerError t < ε := by
    …

    Mentions: OAI.KadisonKastler.commonPositionError, OAI.KadisonKastler.matrixCornerError

  2. theorem OAI.KadisonKastler.uniform_regularCore_strong_stability line 82

    Source documentation

    Uniform strong stability from a type II∞ source regular core. The original and tensor gaps are both hypotheses; no ordinary-gap amplification is asserted.

    theorem uniform_regularCore_strong_stability
        (h : FiniteFactorPublishedInputs.{u})
        (hComm : PublishedRegularCommutant.{u})
        (hSpectral : PublishedRealSpectralCommutant.{u})
        (hDiagonal : PublishedRealDiagonalDecomposition.{u})
        (hCopies : PublishedProperInfiniteProjectionCopies.{u})
        {ε : ℝ} (hε : 0 < ε) :
        ∃ t : ℝ, 0 < t ∧ ∀ (H : Type u) [NormedAddCommGroup H] [InnerProductSpace ℂ H]
          [CompleteSpace H] [TopologicalSpace.SeparableSpace H]
          (M N : VonNeumannAlgebra H),
          PublishedMultiplicationCorrection M →
          PublishedBlockCommutantApproximation (Algebra M) H →
    …

    Mentions: OAI.KadisonKastler.PublishedMultiplicationCorrection, OAI.KadisonKastler.PublishedBlockCommutantApproximation, OAI.KadisonKastler.Algebra