>,</span> <span class="n">v_h</span><span class="p">)</span>
    <span class="n">v_xc</span> <span class="o">=</span> <span class="n">exchange_correlation_potential</span><span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="n">n</span><span class="p">)</span>
    <span class="n">E</span> <span class="o">-=</span> <span class="n">np</span><span class="o">.</span><span class="n">dot</span><span class="p">(</span><span class="n">n</span><span class="p">,</span> <span class="n">