导集
另请参阅
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参考文献
Ferreirós, J. "Cantor's Derived Sets" 和 "Derived Sets and Cardinalities." §4.4.3 和 6.6 in Labyrinth of Thought: A History of Set Theory and Its Role in Modern Mathematics. Basel, Switzerland: Birkhäuser, pp. 141-144 和 202-208, 1999.在 Wolfram|Alpha 上被引用
导集请引用为
Weisstein, Eric W. "Derived Set." 来自 MathWorld-- Wolfram Web 资源。 https://mathworld.net.cn/DerivedSet.html