Boundary point - boundary point
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A point in a topological space that is neither an interior point nor an exterior point of M. The neighborhood of a boundary point of M always includes both points of M and points that do not belong to M. Source: The Selected Edition of the Japanese Language Dictionary About the Selected Edition of the Japanese Language Dictionary Information |
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〘名〙 位相空間における部分集合Ｍの内点でも外点でもない点のＭに対する称。Ｍの境界点の近傍は必ずＭの点もＭに属さない点も含む。
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