送交者: Amsel 于 2008-06-12, 12:50:04:

回答: It depends on the axiom of choice. If we choose Peano axiom 由 steven 于 2008-06-12, 12:39:13:

• 因为质数无穷多、质数不比自然数多、阿列夫零是最小的无穷大 - Amsel (34 bytes) 2008-06-12, 12:53:33 (234887)

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