Perfect set
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A subset A of a topological space S is called a complete set if A is a closed set with no isolated points, i.e., if the set A ' of all the collection points of A coincides with A. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
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位相空間 S の部分集合 A が完全集合であるとは，A が孤立点をもたない閉集合であることをいう。すなわち，A の集積点の全体 A' が A と一致するときである。
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