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Proof step 34 from proof nodups-numoc (conclusion)

⊦ nodups(A) ↔ (∀ n. #oc(n, A, # A) ≤ 1)

User applied rule case distinction

And obtained the following new goals

Proof step 15:
nodups(A) ⊦ ∀ n. #oc(n, A, # A) ≤ 1

Rule argument

pos:right 1

Additional information

[Concretesimprules(())]