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SpECTRE
v2026.04.01
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Auxiliary variable which is analytically the spatial derivative of the scalar field. More...
#include <Tags.hpp>
Public Types | |
| using | type = tnsr::i<DataVector, Dim, Frame::Inertial> |
Auxiliary variable which is analytically the spatial derivative of the scalar field.
If \(\Psi\) is the scalar field then we define \(\Phi_{i} = \partial_i \Psi\)