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 |
〘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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