<div>Dear Eyvaz lsaev:</div>
<div><br>>The only doubt is that in the case band structure calculations turning on the lsym=.true. option </div>
<div>>band.f90 calls sym_band.f90 which reads eigenfunctions and makes intensive symmerty >calculations.<br>Including lsym=true makes certain additional calculation and takes more time.</div>
<div><br>>If this takes place for phonon dispersion relations, too - so nice.<br>>If not?</div>
<div>Sorry, I am not familiar with QE. Therefore, I do not know the answer of your doubt :（</div>
<div>I hope the developers can give certain explanation :）</div>
<div><br><br>____________________________________<br>Hui Wang<br>School of physics, Nankai University, Tianjin, China </div>