<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Feb 22, 2016 at 3:30 PM, Francesco Macheda <span dir="ltr"><<a href="mailto:macheda.franc@gmail.com" target="_blank">macheda.franc@gmail.com</a>></span> wrote:<br><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div>which is the main source of error? Is it the 30% default mixing value</div></div></div></div></blockquote><div><br></div><div>no<br> <br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div>the finite number of k/q-point</div></div></div></div></blockquote><div><br></div><div>finite number of k-points, no, but are you using all k-points in the calculation of the exact exchange term (options nqx1 nqx2 nqx3) or just a subset?<br> <br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div>the really high number of operations involved in the calculations that afflict the precision</div></div></div></div></blockquote><div><br></div><div>no<br><br></div><div>Paolo<br></div></div><br>-- <br><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div>Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche,<br>Univ. Udine, via delle Scienze 208, 33100 Udine, Italy<br>Phone +39-0432-558216, fax +39-0432-558222<br><br></div></div></div></div></div>
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