SpECTRE  v2026.04.01
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gh::Tags::SecondTimeDerivOfSpacetimeMetricCompute< SpatialDim, Frame > Struct Template Reference

Compute item to get second time derivative of the spacetime metric from generalized harmonic and geometric variables. More...

#include <SecondTimeDerivOfSpacetimeMetric.hpp>

Public Types

using argument_tags
using base
using return_type = typename base::type
Public Types inherited from Tags::dt< ::Tags::dt< gr::Tags::SpacetimeMetric< DataVector, SpatialDim, Frame > > >
using type
using tag

Static Public Attributes

static constexpr auto function

Detailed Description

template<size_t SpatialDim, typename Frame>
struct gh::Tags::SecondTimeDerivOfSpacetimeMetricCompute< SpatialDim, Frame >

Compute item to get second time derivative of the spacetime metric from generalized harmonic and geometric variables.

Details

See second_time_deriv_of_spacetime_metric(). Can be retrieved using gr::Tags::SpacetimeMetric wrapped in Tags::dt<Tags::dt>>.

Member Typedef Documentation

◆ argument_tags

template<size_t SpatialDim, typename Frame>
using gh::Tags::SecondTimeDerivOfSpacetimeMetricCompute< SpatialDim, Frame >::argument_tags
Initial value:
tmpl::list<gr::Tags::Lapse<DataVector>,
Prefix indicating a time derivative.
Definition Prefixes.hpp:28
Auxiliary variable which is analytically the spatial derivative of the spacetime metric.
Definition Tags.hpp:38
Conjugate momentum to the spacetime metric.
Definition Tags.hpp:27
Definition Tags.hpp:61

◆ base

template<size_t SpatialDim, typename Frame>
using gh::Tags::SecondTimeDerivOfSpacetimeMetricCompute< SpatialDim, Frame >::base

Member Data Documentation

◆ function

template<size_t SpatialDim, typename Frame>
auto gh::Tags::SecondTimeDerivOfSpacetimeMetricCompute< SpatialDim, Frame >::function
staticconstexpr
Initial value:
= static_cast<void (*)(
const tnsr::I<DataVector, SpatialDim, Frame>&,
const tnsr::I<DataVector, SpatialDim, Frame>&,
const tnsr::iaa<DataVector, SpatialDim, Frame>&,
const tnsr::iaa<DataVector, SpatialDim, Frame>&,
const tnsr::aa<DataVector, SpatialDim, Frame>&,
const tnsr::aa<DataVector, SpatialDim, Frame>&)>(
Require a pointer to not be a nullptr
Definition Gsl.hpp:197
void second_time_deriv_of_spacetime_metric(gsl::not_null< tnsr::aa< DataType, SpatialDim, Frame > * > d2t2_spacetime_metric, const Scalar< DataType > &lapse, const Scalar< DataType > &dt_lapse, const tnsr::I< DataType, SpatialDim, Frame > &shift, const tnsr::I< DataType, SpatialDim, Frame > &dt_shift, const tnsr::iaa< DataType, SpatialDim, Frame > &phi, const tnsr::iaa< DataType, SpatialDim, Frame > &dt_phi, const tnsr::aa< DataType, SpatialDim, Frame > &pi, const tnsr::aa< DataType, SpatialDim, Frame > &dt_pi)
Computes the second time derivative of the spacetime metric from the generalized harmonic variables,...
Tensor< T, Symmetry<>, index_list<> > Scalar
Scalar type.
Definition TypeAliases.hpp:21

The documentation for this struct was generated from the following file:
  • src/PointwiseFunctions/GeneralRelativity/GeneralizedHarmonic/SecondTimeDerivOfSpacetimeMetric.hpp