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Corrections for rational number
1. dense by matte on 2005-01-08 14:13:23 (accepted)
2. Order in Q by pahio on 2004-09-08 03:59:35 (accepted)
3. non-zero by alozano on 2003-12-18 12:15:18 (accepted)
4. layman's terms by akrowne on 2002-02-10 15:09:52 (accepted)

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