">=</span> <span class="n">k_ii</span>
                <span class="n">y_k_ii_sqrt</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">sqrt</span><span class="p">(</span><span class="n">y_k_ii</span><span class="p">)</span>

            <span class="n">K_ij</span> <span class="o">/=</span> <span class="n">np</span><span class="o">.</span><span class="n">outer</span><span class="p">(</span><span class="n">x_k_ii_sqrt</span><span class="p">,</span> <span class="n">