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<div>Dear Paolo
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<div>Sorry because of repeated question. the answer will clear somethig for
me.
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<div>I've already read about brute force in your paper(PRB,39,1989) which is
used
<br />to calculate perturbations in a system(such as ionic displacement).
Am I
<br />rigth?
<br />Also I've studied two of Lazzeri papers about evaluated lambda in
<br />graphene.Do you mean that he doesn't use elph code directly to
calculate
<br />lambda in graphene?
<br />In addition I want to know that does the elph code use new fermi
energy &
<br />Dos at fermi energy after perturbation to calculate lambda?
<br />Mehrnaz
<br />Iran University of science & technology
<br />
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