<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><DIV>Hello everyone</DIV>
<DIV>As i understand, the use of the different approximations for XC energy in the code is defined by the kind of psedopotentials we use.</DIV>
<DIV>I want to know that if someone tries to study 2D systems, is it possible in the code to generate PP's which the XC energy is calculated by the mean of 2D electron gas database (For example the work done by Tanatar & Ceperley, PRB 39, 5005(1989))?</DIV>
<DIV>Thank You</DIV>
<DIV>R.Ebraahimi -- graduate student </DIV>
<DIV>Tehran University</DIV></div><br>
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