n>        <span class="o">=&gt;</span> <span class="n">mat</span><span class="p">%</span><span class="n">nn</span>
      <span class="n">ntot</span>     <span class="o">=&gt;</span> <span class="n">mat</span><span class="p">%</span><span class="n">nt</span>
      <span class="n">nz</span>       <span class="o">=&gt;</span> <span class="n">mat</span><span class="p">%</span><span class="n">nz</span>

      <span class="k">if</span> <span class="p">(</span><span class="n">solver</span><span class="o">==</span>