efore being
subjected to a Metropolis accept step.</p>
<p>First, a value for the momentum is drawn independently of the current
parameter values,</p>
<p><span class="math display">\[
\rho \sim \mathsf{MultiNormal}(0, M).
\]</span></p>
<p>Thus momentum does not persist across iterations.</p>
<p>Next, the joint system <span class="math inline">\((\theta,\rho)\)</span> made up of the current
parameter values <span class="math inline">\(\theta\)</span> and new momentum <span class="math inline">\(\rho\)</span> 