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Term 1: Term 2:

(subclass RealNumber Number) Merge.kif 1891-1891 子類 RealNumber and Number
(subclass RationalNumber RealNumber) Merge.kif 1911-1911 子類 RationalNumber and RealNumber
(subclass IrrationalNumber RealNumber) Merge.kif 1916-1916 子類 IrrationalNumber and RealNumber
(subclass NonnegativeRealNumber RealNumber) Merge.kif 1921-1921 子類 NonnegativeRealNumber and RealNumber
(subclass NegativeRealNumber RealNumber) Merge.kif 1943-1943 子類 NegativeRealNumber and RealNumber
(subclass BinaryNumber RealNumber) Merge.kif 2003-2003 子類 BinaryNumber and RealNumber


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