<html>#2486: make z-symmetry usage explicit in GW150914 example
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<tr><td style='text-align:right'> Reporter:</td><td>Roland Haas</td></tr>
<tr><td style='text-align:right'> Status:</td><td>new</td></tr>
<tr><td style='text-align:right'>Milestone:</td><td></td></tr>
<tr><td style='text-align:right'> Version:</td><td>development version</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 website</td></tr>
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<p>The GW150914 parfile uses Llama’s z symmetry (bitant) to reduce cost. However there is no check in the script that enforces this nor is it (at all) apparent from the Python code that z symmetry is used. The most obvious issue is that the script seems to offer the user to change all 3 components of the reduced spin chi while for z-symmetry only the z component of spin may no non-zero (spin being an axial vector).</p>
<p>Pull request</p>
<p><a data-is-external-link="true" href="https://bitbucket.org/einsteintoolkit/einsteinexamples/pull-requests/3/gw150914rpar-make-z-symmetry-usage" rel="nofollow">https://bitbucket.org/einsteintoolkit/einsteinexamples/pull-requests/3/gw150914rpar-make-z-symmetry-usage</a> </p>
<p>removes the x,y components of chi from the script and adds an explicit check for symmetry violating ID parameters to the script.</p>
<p>--<br/>
Ticket URL: <a href='https://bitbucket.org/einsteintoolkit/tickets/issues/2486/make-z-symmetry-usage-explicit-in-gw150914'>https://bitbucket.org/einsteintoolkit/tickets/issues/2486/make-z-symmetry-usage-explicit-in-gw150914</a></p>
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