LAPACK/ScaLAPACK diagonalization routines in the post SCF calculations. Available choices are ' ', 'R', 'D', and 'X'.</li><br>
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<a name=pt3_a_diagrams><li>                 <span style="display:inline-block;background:#EEEEEE;width:400px">               <b>pt3_a_diagrams</b>  </span>  
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<i>Optional</i><br>
Default: yes<br><br>
Switch whether to calculate the A diagrams family in PT3. A diagrams are the self-consistent diagrams (PT2 inclusions in the Green's function). Valid choices include: 'yes'