<div class="iw_mail" dir="auto" style="font-size: 13px;"><div>Dear QE Developers and Users,</div><div><br></div><div>Hi.</div><div>In paper by I. Timrov et. al. PRB 103, 045141 (2021), on 7th page it is stated that:</div><div><br></div><div><span style="font-family: Times New Roman, Times, serif; font-size: 16px;"><strong>"In view of the fact that the DFT+U (+V ) electronic ground<br>state is often qualitatively different from the DFT one, it is<br>usually a good idea to start the self-consistent loop in Fig. 1<br>from finite Uin and Vin to avoid oscillations in their value<br>during the initial steps of their calculations. Since U and V<br>depend on the Hubbard manifold on which they act, a reason-<br>able guess of U in and V in can only come from a calculation<br>done for a similar material and the same pseudopotential"</strong></span></div><div><br></div><div><span style="font-family: Roboto, Tahoma, Helvetica, sans-serif; font-size: 13px;">Does it mean to use empirical values fitted to experiment?</span></div><div><span style="font-family: Roboto, Tahoma, Helvetica, sans-serif; font-size: 13px;">Thanks in advance.</span></div><div><br></div><div><span style="font-family: Roboto, Tahoma, Helvetica, sans-serif; font-size: 13px;">Best regards,</span></div><div>Mahmoud Payami<div>NSTRI, AEOI,Tehran, Iran</div><div><br></div></div></div>