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def definition def or abbrev

defectIterate

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formal statement (Lean)

  54def defectIterate (t : ℝ) (n : ℕ) : ℝ := Real.cosh ((2 : ℝ) ^ n * t) - 1

proof body

Definition body.

  55
  56/-- dₙ(0) = 0 for all n: on the critical line, all iterates vanish. -/

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