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def definition def or abbrev

totalJcost

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formal statement (Lean)

  92noncomputable def totalJcost (v : ℝ) (neighbors : List ℝ) : ℝ :=

proof body

Definition body.

  93  (neighbors.map (fun n => Jcost (v / n))).sum
  94
  95/-- Total bond cost is non-negative when v > 0 and all neighbors positive -/

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