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theorem proved term proof

universalCost_single_one

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formal statement (Lean)

 109@[simp] theorem universalCost_single_one (p : P) :
 110    universalCost (Finsupp.single p 1) = primeJcost p := by

proof body

Term-mode proof.

 111  rw [universalCost_single]
 112  ring
 113

depends on (3)

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