>>957

英語すら理解できないカスだな。。もう何も言うな馬鹿。
「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".」

>>958

おい、負け犬。さっさと謝って消えろ。ゴミ。