a mathematical notion
一个数学概念
以上为机器翻译结果，长、整句建议使用 人工翻译 。
If the mathematical ideas are out there, waiting to be found, then somehow a purely abstract notion has to have existence even when no human being has ever conceived of it.
如果数学思想在某处等待着被发现，那么即使人类从未构想，一个纯粹抽象的概念也必须存在。
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