Example: G3W2 calculation: H2O
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"Download G3W2_H2O.run"

   #! /bin/sh

   # G3W2 calculation H2O.
   # G3W2 is a GW calculation plus a perturbative second-order statically
   # screened exchange correction (second order expansion in the self-energy).
   # Note, that there the self-energy is always static.
   # Only a second-order screened exchange correction
   # is evaluated after the GW calculation is completed.

   $AMSBIN/ams << eor
   Symmetry
     SymmetrizeTolerance 0.001
   End

   System
     Atoms
       O    2.220871067   0.026716792   0.000620476
       H    2.597492682  -0.411663274   0.766744858
       H    2.593135384  -0.449496183  -0.744782026
     End
     Symmetrize Yes
   End

   task SinglePoint

   Engine adf
     Basis
       Core None
       Type TZ2P
     end

     NumericalQuality GOOD

     XC
       hartreefock
     end

     GW
        selfenergy G3W2
        nstates 1
     END
   EndEngine
   eor
