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Relation: subclass

direct-childrendocumentationgraph
SetOrClass6这是 SetClassSetOrClass,也就是说 任何 Abstractelementinstance的实例。^
    Set4这是个 SetOrClass 能满足延伸性和由集合理论的某些选择所指定 的其他约束。Set 在两个重要方面与 Classes 不同:第一,Sets 是可以延伸的 - 两个拥有一样 &...^
        NullSet.任何没有实例的 SetOrClass^
        NonNullSet.任何包含起码一个实例的 SetOrClass^
        FiniteSet.这是一个包含一组有限元素的 Set^
        SetOfEquations.^

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