What makes you think of "如果为0"?


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送交者: LaoXiao 于 2009-01-15, 08:45:51:

回答: 如果为0的话,问题已经变质了吧? 由 田野 于 2009-01-15, 08:10:20:

"arbitrarily small" and "there is no lower bound > 0" don't mean it will become zero.



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