Dear Paolo,<br><br>Thank you.<br><br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div class="im">
you can do this if you use the Gamma-point (k=0) only, not in general<br></div>
<br></blockquote><div> <br>Is it possible to extend to more k points.<br><br>Jie<br><br></div></div>