送交者: sybil 于 2007-01-09, 14:23:40:

回答: 白痴！数量关系是这个宇宙的最基本运作关系之一。 由 xinku 于 2007-01-09, 13:21:41:

• they map to each others. (无内容) - steven (0 bytes) 2007-01-09, 15:33:03 (119486)
  • show us the mapping function then. ：） (无内容) - fuzzify (0 bytes) 2007-01-09, 16:21:19 (119495)
    • Number theory and quantum mechanics - 唐好色 (118 bytes) 2007-01-10, 01:05:40 (119560)
      • Thanks. Glad to learn this stuff from you guys. - fuzzify (107 bytes) 2007-01-10, 11:28:39 (119617)
    • by definition, every element in a countable infinite set has - steven (35 bytes) 2007-01-09, 16:30:22 (119496)
      • is [0,1] countable then? :) (无内容) - fuzzify (0 bytes) 2007-01-09, 16:42:07 (119497)
        • if the set is rational, it is countable. If it is a set of real, it is not. (无内容) - steven (0 bytes) 2007-01-09, 16:43:03 (119498)
          • Exactly. In real world, how can you ignore irrational ones (无内容) - fuzzify (0 bytes) 2007-01-09, 16:49:42 (119500)
            • that's what I was trying to say: there is no 1-1 mapping between - fuzzify (26 bytes) 2007-01-09, 23:41:15 (119554)
            • to be exact, the function should 1-1 or bidirectional. (无内容) - 匆匆过客 (0 bytes) 2007-01-09, 22:35:41 (119551)
            • you already said integers is countable, but real numbers are not. - fuzzify (68 bytes) 2007-01-09, 21:44:44 (119543)
            • typo: the cardinal of Real is Beth one. (无内容) - steven (0 bytes) 2007-01-09, 18:26:28 (119515)
            • The real number, which is called continuum isn't a countable set. - steven (222 bytes) 2007-01-09, 17:58:25 (119510)
            • ok. Anyway, there is no such mapping function between - fuzzify (32 bytes) 2007-01-09, 17:31:01 (119505)
            • then again, in the real world, things are actually quantized. :) - steven (77 bytes) 2007-01-09, 17:10:19 (119503)

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