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theorem proved term proof

deflection_pos_of_ne_zero

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formal statement (Lean)

  80theorem deflection_pos_of_ne_zero {t : ℝ} (h : t ≠ 0) :
  81    0 < deflection t := by

proof body

Term-mode proof.

  82  unfold deflection
  83  apply div_pos
  84  · exact mul_pos impulseCoefficient_pos (by positivity)
  85  · norm_num
  86
  87/-! ## §3. Master certificate -/
  88

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