0751名無しのひみつ垢版 | 大砲2022/05/14(土) 13:16:59.11ID:Ic4UNeva >>749 繰り返すなよ。 資料にあっただろ↓。 A metric space is a pair (X, d) where X is a set and d is a metric on X. Almost always, when d is understood, we engage in the abuse of language and speak of "the metric space X".