Exterior point
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An exterior point of a subset A of a topological space S is a point p that does not belong to A and has a neighborhood that has no points in common with A. In other words, p is an exterior point of A if p is an interior point of the complement of 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 の外点とは，A に属さない点 p で，A と共通点をもたないような近傍が存在するものをいう。すなわち，p が A の外点であるとは，p が A の補集合の内点となっているということである。
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