Update README.md

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Liz
2015-12-22 15:17:38 -08:00
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@@ -88,7 +88,7 @@ Input File | Description | APBS Version | Results (kJ/m
<a name=5></a><sup>5</sup> The discrepancy in values between versions 1.0.0 and 1.1.0 is due to a bugfix in the implementation of the boundary conditions. This bug introduces a very small error (generally less than 1%) the calculated results.
<a name=6></a><sup>6</sup> APBS 1.2 has switched the multigrid smoothing algorithm from standard Gauss-Seidel to Gauss-Seidel red/black in order to facilitate parallelization. This switch has caused small differences in individual calculation energies which, when combined to the final answer, create larger errors (up to 0.04%). These errors can be reduced by resetting the APBS error tolerance to 1e-9 or smaller values. For a more detailed explanation, please see [here](http://is.gd/45AzN).
<a name=6></a><sup>6</sup> APBS 1.2 has switched the multigrid smoothing algorithm from standard Gauss-Seidel to Gauss-Seidel red/black in order to facilitate parallelization. This switch has caused small differences in individual calculation energies which, when combined to the final answer, create larger errors (up to 0.04%). These errors can be reduced by resetting the APBS error tolerance to 1e-9 or smaller values. For a more detailed explanation, please see the FAQ, [here](http://www.poissonboltzmann.org/docs/apbs-faq/#sources error calculation).
<a name=7></a><sup>7</sup> The discrepancy in values between versions 1.2 and 1.2.1 is most likely due to the following factor(s):