[Pw_forum] help: phonon calculation of Ag

[hailin yu]

Dear all:
    I have calculated the phonon dispersion of Ag and our results( see the 
attach) is well greement with a previous work( PRB 8,5532(1973)) except a 
lit difference: along the [110] direction, there is a cross point (up two 
curves) in the literature, while our results have no such a point ( alougth 
it's seem too). So we want to know our results is reliable? If not, why is 
the reason?
Thanks in advance!
yuhailin

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