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["lvying" <lvying@ctb.pku.edu.cn>]

Hi all:
    who can tell me how I can obtain the shape of fermi face in K space?  
Alough the Fermi Energy is convenient to konw, I have no idea about the K--E 
relationship (I means volume data, not the sparse k points) in K space.
    btw, if I process cut3d to a _WFK files, what do I get? the density in 
REAL SPACE? or the E--K relation in K SPACE?
if the first, the result is a little different with that by cutting a _DEN 
file ?

    Thanks!