d to represent the virtual orbital space with fewer functions. This is the small basis set used for elements with an effective core potential. Only meaningful for GW.</li><br>
<hr>
<a name=eta><li>                 <span style="display:inline-block;background:#EEEEEE;width:400px">               <b>eta</b>  </span>  
<br><br>
<i>Optional</i><br>
Default: 0.001<br><br>
Is a the tiny imaginary part used in the denominator of the Green's function to shift the pole off the axis, so to avoid divergences.This is an