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def definition def or abbrev

horizonArea

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formal statement (Lean)

  53noncomputable def horizonArea (bh : RSBH) : ℝ :=

proof body

Definition body.

  54  4 * Real.pi * (schwarzschildRadius bh) ^ 2
  55
  56/-- Recognition Boltzmann constant: k_R = ln φ ≈ 0.481.
  57    This is the information cost of one recognition event (one φ-bit). -/

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