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[Takeshi NISHIMATSU <t_nissie@yahoo.co.jp>]

Dear Eric Bousquet and all,

You wrote:
> It seems that you didn't apply any acoustic sum rule.
> Can you redo your calculations of phonons by including the acoustic sum
> rule and let see the results?
> Since from each different ecut you don't have exactly the same violation
> of the acoustic sum rule (ideally the acoustic modes should have a
> frequency of 0 cm-1), your frequencies and eigenvectors will be affected
> differently on each ecut.

I just added "rfasr 1" or "rfasr 2" to the input files, but
I got same IFC matrices and phonon frequences for each ecut.

For example,
% egrep 'ecut|rfasr' perovskite-Gamma.in
    rfasr   2
     ecut  60.0        # Maximal kinetic energy cut-off, in Hartree
% grep -A 8 '  Phonon wavevector' perovskite-Gamma.out | grep '^-'
- -7.824132E+01 -7.824132E+01 -7.823997E+01  9.019223E+00  9.021527E+00
-  9.021527E+00  1.866891E+02  1.866893E+02  1.866893E+02  2.889640E+02
-  2.889640E+02  2.889640E+02  4.900738E+02  4.900739E+02  4.900739E+02

Is it OK?
-- 
 Takeshi Nishimatsu
 love && peace && free_software
 http://loto.sourceforge.net/feram/
      Fast MD program for perovskite-type ferroelectrics