mathcal{R}_m(z_s)\)</span>: Source frame merger rate density at source redshift <span class="math notranslate nohighlight">\(z_s\)</span>.</p></li>
<li><p>Differential co-moving volume : <span class="math notranslate nohighlight">\(\frac{dV_c}{dz_s}\)</span>.</p></li>
<li><p><span class="math notranslate nohighlight">\(\frac{1}{1+z_s}\)</span>: this factor takes care of the time dilation effect.</p></li>
</ul>
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