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Hi,
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<div class="">I don't know why the mailing list formatted my email in that way! It has added line breaks where there should not be any. Here is another attempt:</div>
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<div class="">I use the parameter</div>
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<div class=""><span class="Apple-tab-span" style="white-space:pre"></span>TwoPunctures::TP_epsilon = 1e-6</div>
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<div class="">to ensure that the NaN never appears, no matter where I place the BHs. This replaces a denominator</div>
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<div class=""><span class="Apple-tab-span" style="white-space:pre"></span>sqrt (pow (r2_plus, 2))</div>
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<div class="">with</div>
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<div class=""><span class="Apple-tab-span" style="white-space:pre"></span>sqrt (pow (r2_plus, 2) + pow (TP_epsilon, 4))</div>
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<div class="">See</div>
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<div class=""><span class="Apple-tab-span" style="white-space:pre"></span><a href="https://bitbucket.org/einsteintoolkit/einsteininitialdata/src/master/TwoPunctures/src/Equations.c#lines-91" class="">https://bitbucket.org/einsteintoolkit/einsteininitialdata/src/master/TwoPunctures/src/Equations.c#lines-91</a></div>
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<div class="">so adds a fixed source of error to your evolution, but the effect of this is negligible.</div>
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-- <br class="">
Ian<b class=""><span class="Apple-converted-space"> </span></b>Hinder<br class="">
Research Software Engineer<br class="">
University of Manchester, UK</div>
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