<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:14pt"><div> </div><div style="font-family: times new roman, new york, times, serif; font-size: 14pt;"><div style="font-family: times new roman, new york, times, serif; font-size: 12pt;">Dear pwscf users.<br><div id="yiv1393166329"><div><div style="color:#000;background-color:#fff;font-family:times new roman, new york, times, serif;font-size:12pt;">How to calculate the binding energy for O2, which command I can added to the input?<br><br>best regards<div> </div><div>DEBBICHI Mourad<br>Unité de Recherche Physique des Solides,99/UR/13-19,<br>Département de Physique, Faculté des Science de Monastir,<br>Avenue de l'Environnement 5019, Monastir Tunisie.<br>tél:+21697487042<br>mourad_fsm@yahoo.fr</div></div></div></div><br><br> </div> </div> </div></body></html>