[Wien] use of PW scaling factor and case.inso

[Atta-fynn, Raymond]

Dear WIEN users,
 
(1) What exactly is the plane wave scaling factor in 
case.inm. It is not mentioned at all in the manual. Is 
it useful? Does help in convergence?
 
(2) If I'm only interested in the total energy in an SO 
calculation and NOT the Spin-orbit energy eigenvalues, 
can I make the energy window Emin and Emax in case.inso 
as small (in absolute value) as possible? 
 
For example can I reduce the default Emin= -10 Ry and 
Emin=1.5 to Emin= -0.2 Ry and Emax = 0.2 Ry to save 
some computation time. 
 
Thanks
 
R. Atta-Fynn
 
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