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Term 1: Term 2:

(subclass NonnegativeRealNumber RealNumber) Merge.kif 1932-1932 Nonnegative real number is a subclass of real number
(subclass PositiveRealNumber NonnegativeRealNumber) Merge.kif 1943-1943 Positive real number is a subclass of nonnegative real number
(subclass NonnegativeInteger NonnegativeRealNumber) Merge.kif 1987-1987 Nonnegative integer is a subclass of nonnegative real number


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