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theorem proved term proof

flameSpeed_pos

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formal statement (Lean)

  37theorem flameSpeed_pos (k : ℕ) : 0 < flameSpeed k := by

proof body

Term-mode proof.

  38  unfold flameSpeed referenceSpeed
  39  have : 0 < phi ^ k := pow_pos Constants.phi_pos k
  40  linarith [this]
  41
  42/-- Adjacent-rung flame speeds ratio by exactly φ. -/

used by (3)

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depends on (8)

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