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def definition def or abbrev

H_AczelClassification

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formal statement (Lean)

  82def H_AczelClassification : Prop :=

proof body

Definition body.

  83  ∀ (H : ℝ → ℝ),
  84    H 0 = 1 →
  85    Continuous H →
  86    (∀ t u, H (t + u) + H (t - u) = 2 * H t * H u) →
  87    ContDiff ℝ ⊤ H
  88
  89/-! ## §3 Integration Bootstrap: Continuous → C^∞ -/
  90
  91noncomputable section
  92

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