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theorem proved wrapper

errorRateCost_at_threshold

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formal statement (Lean)

  47theorem errorRateCost_at_threshold (r : ℝ) (h : r ≠ 0) :
  48    errorRateCost r r = 0 := by

proof body

One-line wrapper that applies unfold.

  49  unfold errorRateCost; rw [div_self h]; exact Jcost_unit0
  50

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