<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div>hi all<br data-mce-bogus="1"></div><div>I want to optimize a supercell of graphene bilayer with 16 atoms. I choose ecut= 150 Ry , kpoints = 3*3*1, but i don't sure about it. I should converge these values before vc-relax?<br data-mce-bogus="1"></div><div><span id="result_box" class="short_text" lang="en"><span class="">Can anyone help me?</span></span></div><div><span class="short_text" lang="en"><br data-mce-bogus="1"></span></div><div><span class="short_text" lang="en"><br data-mce-bogus="1"></span></div><div><span class="short_text" lang="en">Best regards<br data-mce-bogus="1"></span></div><div>sabike ghasemi<br data-mce-bogus="1"></div><div>phd student<br data-mce-bogus="1"></div><div>damghan university<br data-mce-bogus="1"></div></div></body></html>