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[zhangting <zhangting@pku.edu.cn>]

Matthieu Verstraete,您好！

        Thank you very much!

======= 2006-06-06 10:17:00 您在来信中写道：=======

>tolvrs=1E-18 is abominably low. In any real life case where there is 
>vaccuum you can never hope to get the potential that precise. 1E-17 is 
>already very good. For solid state systems (bulk) you can hope to get down 
>to tolvrs=1E-18 but in most cases it's overkill.
>
>Matthieu
>
>-- 
>================================================================
>Dr. Matthieu Verstraete                 mailto:mjv500@york.ac.uk
>Dept. of Physics, University of York,     tel: +44 1904 43 22 08
>Heslington, YO10 5DD York, United Kingdom fax: +44 1904 43 22 14
>.

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　　　　　　　　致
礼！
 
                                 
　　　　　　　　zhangting
　　　　　　　　zhangting@pku.edu.cn
　　　　　　　　　　2006-06-08