扩张性 - 引用次数：2参考来源 - RCC11复合表的表示 Representation of RCC11 Composition Table
外延性
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Extensionality
abstract:In logic, extensionality, or extensional equality refers to principles that judge objects to be equal if they have the same external properties. It stands in contrast to the concept of intensionality, which is concerned with whether the internal definitions of objects are the same.
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the principle that sets are definable in terms of their elements alone, whatever way they may have been selected. Thus {a, b}={b, a}={first two letters of the alphabet} 外延性原则
[logic]
Itwasmyfirst implicit appreciationof the principle of extensionalitybywhichIhave set such store down the decades: the universal is no more than the sum of itsparticulars.