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Re:F is a mistake?

Posted by tju_rhythm at 2006-08-27 13:17:56 on Problem 2988
In Reply To:F is a mistake? Posted by:tju_rhythm at 2006-08-27 13:17:31 
> e(x) = 1 - |sgn(x)| 
> is always 0
> is it correct?
> it maybe a mistake about problem~~

sorry the problem is H~~
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