el-ph constants at various q-points & average el-ph constant

Running EPW
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Dear Ponce,

In the ‘hands on’ of “electron-phonon coupling in QE” of “Summer School 2018” _I have the following questions
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  1. In the example for Pb: the code generates el-ph constants at various q-points. how to get average el-ph constant for all of the material
  2. Do these calculations using QE takes into consideration “vertex correction”
  3. Difference in calculating using QE and EPW

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