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SpECTRE
v2026.04.01
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Auxiliary variable which is analytically the spatial derivative of the natural log of the conformal factor. More...
#include <Tags.hpp>
Public Types | |
| using | type = tnsr::i<DataType, Dim, Frame> |
Auxiliary variable which is analytically the spatial derivative of the natural log of the conformal factor.
If \(\phi\) is the conformal factor, then we define \(P_i = \partial_i ln(\phi) = \frac{\partial_i \phi}{\phi}\).