SpECTRE
v2024.05.11
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The conformal longitudinal operator applied to the background shift vector minus the time derivative of the conformal metric \((\bar{L}\beta_\mathrm{background})^{ij} - \bar{u}^{ij}\). More...
#include <Tags.hpp>
Public Types | |
using | type = tnsr::II< DataType, Dim, Frame > |
The conformal longitudinal operator applied to the background shift vector minus the time derivative of the conformal metric \((\bar{L}\beta_\mathrm{background})^{ij} - \bar{u}^{ij}\).
This quantity appears in formulation of the XCTS equations (see Xcts
) and serves to specify their free data \(\bar{u}_{ij}\). It is combined with the longitudinal background shift because the two quantities are degenerate.
Xcts::Tags::ShiftBackground