.</p>
<p>For example, consider the value <code>lp__</code>, which is the log posterior
density (up to a constant).<a href="#fn27" class="footnote-ref" id="fnref27"><sup>27</sup></a></p>
<p>It is thus a mistake to declare convergence in any practical sense if
<code>lp__</code> has not converged, because different chains are really in
different parts of the space. Yet measuring convergence for <code>lp__</code> is
particularly tricky, as noted below.</p>
<div id="asymptotics-and-transience-vs.-equilibrium" cl