[Pw_forum] *.fc file in PW_SCF help.

[Paolo Giannozzi]

On Aug 1, 2009, at 3:25 , xirainbow wrote:

> And at the up email, you said it shoud be "C_{na \alpha, nb \beta} 
> (R)",
> instead of "F_{\alpha,\beta}^{i,j}(R),". I am a little confused.

and I am fed up with people who can't sort out even the tiniest
and most trivial detialsdetails. Force constants have two atom
indices, two polarization indices, depend upon lattice vectors.

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Paolo Giannozzi, Dept of Physics, University of Udine
via delle Scienze 208, 33100 Udine, Italy
Phone +39-0432-558216, fax +39-0432-558222