 \sum_{t=1}^{2m+1} \hat{\rho}_t = -1 + 2 \sum_{t&#39;=0}^{m} \hat{P}_{t&#39;},
\]</span></p>
<p>where <span class="math inline">\(\hat{P}_{t&#39;}=\hat{\rho}_{2t&#39;}+\hat{\rho}_{2t&#39;+1}\)</span>. Initial
positive sequence estimators is obtained by choosing the largest <span class="math inline">\(m\)</span>
such that <span class="math inline">\(\hat{P}_{t&#39;}&gt;0, \quad t&#39; = 1,\ldots,m\)</span>. The initial monotone
sequence is obtained by further reducing <span class="math inline">\(\hat{P}_{t&#