<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:14pt"><div><span><br></span></div> <br>Hello everybody, I want to ask about the optimization of atomic positions, How to do it<br>Thank you so much <br>Best regards<br>M. Hadjab<br></div></body></html>