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<DIV><FONT face=宋体 size=2>Dear all PWscf users,</FONT></DIV>
<DIV><FONT face=宋体 size=2> </FONT></DIV>
<DIV><FONT face=宋体 size=2>I want to investigate the electric field effect
by pwscf . How to use pwscf by density-functional perturbation theory or
self-consistent finite electric field. I did not find those from the manual.
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<DIV><FONT face=宋体 size=2>Thank you in advance!</FONT></DIV></BODY></HTML>