| a little correction |
| 送交者: rednose 2008月07月03日11:48:42 于 [灵机一动] 发送悄悄话 |
| 回 答: c does not necessarily exists in existing domain. 由 rednose 于 2008-07-03 11:37:35 |
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a rational number A is now (or equivalent to) a class of sequences represented by a constant sequence {A, A, A, ..., A, A, ....} which can be denoted by A (now A is a notation for the rational number A).
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