 the number of grid points use to evaluate the exchange-correlation integrals in real space for the DFT potential and energy. Possible values are 'low', 'medium', 'high', 'very high', 'insane'. It could be abbreviated in 'l', 'm', 'h', 'vh', 'i'. 'high' is usually fine. 'insane' is only meant for debugging since it is overdoing a lot.</li><br>
<hr>
<a name=init_hamiltonian><li>                 <span style="display:inline-block;background:#EEEEEE;width:400px">               <b>init_hamiltonian</b>  </span>  