begin
:: deftheorem Def1 defines cup-closed FINSUB_1:def 1 :
:: deftheorem defines cap-closed FINSUB_1:def 2 :
:: deftheorem Def3 defines diff-closed FINSUB_1:def 3 :
:: deftheorem Def4 defines preBoolean FINSUB_1:def 4 :
theorem
canceled;
theorem
canceled;
theorem
canceled;
theorem
canceled;
theorem
canceled;
theorem
canceled;
theorem
canceled;
theorem
canceled;
theorem
canceled;
theorem Th10:
theorem
canceled;
theorem
canceled;
theorem Th13:
theorem Th14:
theorem
theorem
theorem
theorem Th18:
theorem
canceled;
theorem Th20:
theorem
:: deftheorem Def5 defines Fin FINSUB_1:def 5 :
theorem
canceled;
theorem Th23:
theorem
theorem
theorem Th26:
theorem Th27:
theorem
theorem
canceled;
theorem
theorem
canceled;
theorem
theorem
canceled;
theorem