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theorem proved term proof

horizonAtRung_pos

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formal statement (Lean)

  46theorem horizonAtRung_pos (k : ℕ) : 0 < horizonAtRung k := by

proof body

Term-mode proof.

  47  unfold horizonAtRung referenceHorizon
  48  have : 0 < phi ^ (-(k : ℤ)) := zpow_pos Constants.phi_pos _
  49  linarith [this]
  50

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depends on (3)

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