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frostblooded

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Dec 25th, 2019
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Prolog 0.14 KB | None | 0 0
  1. not_member(_, []).
  2. not_member(X, [H|T]) :- H \= X, not_member(X, T).
  3.  
  4. fin_subset_nat([]).
  5. fin_subset_nat([H|T]) :- not_member(H, T), nat(H).
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