SpECTRE
v2024.03.19
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Holds a quantity that's similar to the shift, but isn't the shift. More...
#include <Tags.hpp>
Public Types | |
using | type = tnsr::I< DataType, Dim, Frame > |
Holds a quantity that's similar to the shift, but isn't the shift.
This holds
\begin{equation} \beta^i \frac{\partial x^\hat{i}}{\partial x^i} = \hat{beta}^\hat{i} + \frac{\partial x^\hat{i}}{\partial t} \end{equation}
where hatted quantities are in the distorted frame and non-hatted quantities are in the grid frame.