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Re: A puzzle
no interesting~：）
x*x=x+x+......+x
in this, x is integer
but, we should know, the define of derivative~
the dx should be infinitesimal~ :)
The one phonon Raman spectrum in microcrystalline silicon
H. Richter, Z. P. Wang+ and L. Ley
Max-Planck-Institute für Festkörperforschung, Heisenbergstr. 1, 7000, Stuttgart 80, Federal Republic of Germany
Received 15 May 1981. by Manuel Cardona Available online 6 September 2002.
Solid...
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