version</a>.
</div>
<div id="covariance" class="section level2">
<h2><span class="header-section-number">5.12</span> Covariance Functions</h2>
<div id="exponentiated-quadratic-covariance-function" class="section level3">
<h3><span class="header-section-number">5.12.1</span> Exponentiated quadratic covariance function</h3>
<p>The exponentiated quadratic kernel defines the covariance between
<span class="math inline">\(f(x_i)\)</span> and <span class="math inline">\(f(x_j)\)</span> where <span class="math inl