<html>#2916: Include Cottonmouth
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<tr><td style='text-align:right'> Reporter:</td><td>Beyhan Karakaş</td></tr>
<tr><td style='text-align:right'> Status:</td><td>open</td></tr>
<tr><td style='text-align:right'>Milestone:</td><td>ET_2026_05</td></tr>
<tr><td style='text-align:right'> Version:</td><td></td></tr>
<tr><td style='text-align:right'> Type:</td><td>enhancement</td></tr>
<tr><td style='text-align:right'> Priority:</td><td>major</td></tr>
<tr><td style='text-align:right'>Component:</td><td>EinsteinToolkit thorn</td></tr>
</table>
<p>Comment (by Zach Etienne):</p>
<p>Issues found (sorry for the uneven formatting):</p>
<div class="codehilite"><pre><span></span><code><span class="n">Issue</span> <span class="mi">1</span><span>:</span>
<span class="n">Missing</span> <span class="n">symmetrization</span> <span class="ow">in</span> <span class="n">the</span> <span class="n">conformal</span> <span class="n">Ricci</span> <span class="n">tensor</span> <span class="n">inside</span> <span class="n">the</span> <span class="k">constraints</span><span class="o">/</span><span class="n">analysis</span> <span class="n">block</span><span class="p">.</span>
<span class="k">Where</span> <span class="n">the</span> <span class="n">bug</span> <span class="k">is</span>
<span class="ow">In</span> <span>`</span><span class="n">fun_bssn_cons</span><span>`</span><span class="p">,</span> <span class="n">the</span> <span class="n">code</span> <span class="n">uses</span>
<span class="o">+</span> <span class="n">Delta</span><span class="o">[</span><span class="n">uc</span><span class="o">]</span> <span class="o">*</span> <span class="n">Gammat</span><span class="o">[</span><span class="n">la, lb, lc</span><span class="o">]</span>
<span class="n">but</span> <span class="ow">in</span> <span class="n">the</span> <span class="n">BSSN</span> <span class="n">Ricci</span> <span class="n">decomposition</span> <span class="n">the</span> <span class="k">corresponding</span> <span class="n">term</span> <span class="k">is</span> <span class="n">the</span> <span class="n">symmetrized</span> <span class="k">object</span>
<span class="n">Delta</span><span class="o">^</span><span class="n">c</span> <span class="o">*</span> <span class="n">Gammat_</span><span class="p">(</span><span class="n">ab</span><span class="p">)</span><span class="n">c</span>
<span class="n">which</span> <span class="n">means</span>
<span class="p">(</span><span class="mi">1</span><span class="o">/</span><span class="mi">2</span><span class="p">)</span> <span class="o">*</span> <span class="n">Delta</span><span class="o">^</sp
<p>--<br/>
Ticket URL: <a href='https://bitbucket.org/einsteintoolkit/tickets/issues/2916/include-cottonmouth'>https://bitbucket.org/einsteintoolkit/tickets/issues/2916/include-cottonmouth</a></p>
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