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[pengyoucool@yahoo.com.cn]

Dear users,
   I am a new user in abinit.Nowadays,I'm learning the calculation
of energy band_gap in the GW approximation through the tutorials.The
example in that is Si that is direct band_gap with FCC structure.
   I want to learn how to calculate the indirect band_gap.How should
I modify my input file.Besides,if I want to focus on the orthorhombic
structure with space group 62_Pnma,then what the "rprim" in my input
file should be?
   On the other hand,in the GW's tests in the tutorial,what is the difference
between lesson1 and lesson9?If I adjust the parameters,whether can I use 
tgw_1.in
as my input file?
   I need your help.Look forward to your reply.Thank you in advance.

                                                                   yours,
                                                                   Friend