rho | \theta) - \log p(\theta).
\\[3pt]
&amp; = &amp; T(\rho | \theta) + V(\theta),
\end{array}
\]</span></p>
<p>where the term</p>
<p><span class="math display">\[
T(\rho | \theta) = - \log p(\rho | \theta)
\]</span></p>
<p>is called the “kinetic energy” and the term</p>
<p><span class="math display">\[
V(\theta) = - \log p(\theta)
\]</span></p>
<p>is called the “potential energy.” The potential energy is specified
by the Stan program through its definition of a log density.</p>
</div>
<div id="gen