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