極限的嚴格定義是柯西給出的。無窮純粹是一個數學entity，物質世界不會有真正的無窮。

來源: QualityWithoutName 於 2016-06-06 11:20:38 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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