Can someone help answer my questions. Thank you so much! On Wed, Oct 24, 2012 at 7:38 PM, Caloma Trumica <spmmal at gmail.com> wrote:
> Dear all, > > I do not understand why the two highlighted places in the attached DFPT > review paper are correct. > > I repeat my questions here: > > 1. Why the contributions from valence bands cancel each other? > > 2. Why the left side of Eq.25 has a null eigenvalue? > > Thank you! > > Andy > -------------- next part -------------- An HTML attachment was scrubbed... URL: http://pwscf.org/pipermail/pw_forum/attachments/20121025/80c7e2f3/attachment.html
