SpECTRE  v2026.04.01
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LinearSolver::Actions::BuildMatrix< FieldsTag, FixedSourcesTag, OperandTag, OperatorAppliedToOperandTag, CoordsTag, ArraySectionIdTag > Struct Template Reference

Build the explicit matrix representation of the linear operator and optionally invert it directly to solve the problem. More...

#include <BuildMatrix.hpp>

Public Types

template<typename Metavariables>
using component_list
template<typename ApplyOperatorActions>
using actions
using amr_projectors = tmpl::list<ProjectBuildMatrix<BuildMatrixMetavars>>
using register_actions
 Add to the register phase to enable observations.
using reset_actions = tmpl::list<ResetBuiltMatrix<BuildMatrixMetavars>>
 Add to the action list to reset the matrix.

Detailed Description

template<typename FieldsTag, typename FixedSourcesTag, typename OperandTag, typename OperatorAppliedToOperandTag, typename CoordsTag, typename ArraySectionIdTag = void>
struct LinearSolver::Actions::BuildMatrix< FieldsTag, FixedSourcesTag, OperandTag, OperatorAppliedToOperandTag, CoordsTag, ArraySectionIdTag >

Build the explicit matrix representation of the linear operator and optionally invert it directly to solve the problem.

This is useful for debugging and analysis only, not to actually solve the elliptic problem (that should happen iteratively).

Add the actions to the action list to build the matrix. The ApplyOperatorActions template parameter are the actions that apply the linear operator to the OperandTag. Also add the amr_projectors to the list of AMR projectors and the register_actions

Template Parameters
FieldsTagThe solution will be stored here (if direct solve is enabled).
FixedSourcesTagThe source b in the problem Ax = b. Only used if direct solve is enabled.
OperandTagWill be set to unit vectors, with the '1' moving through all points over the course of the iteration.
OperatorAppliedToOperandTagWhere the ApplyOperatorActions store the result of applying the linear operator to the OperandTag.
CoordsTagThe tag of the coordinates observed alongside the matrix for volume data visualization.
ArraySectionIdTagCan identify a subset of elements that this algorithm should run over, e.g. in a multigrid setting.

Member Typedef Documentation

◆ actions

template<typename FieldsTag, typename FixedSourcesTag, typename OperandTag, typename OperatorAppliedToOperandTag, typename CoordsTag, typename ArraySectionIdTag = void>
template<typename ApplyOperatorActions>
using LinearSolver::Actions::BuildMatrix< FieldsTag, FixedSourcesTag, OperandTag, OperatorAppliedToOperandTag, CoordsTag, ArraySectionIdTag >::actions
Initial value:
tmpl::list<CollectTotalNumPoints<BuildMatrixMetavars>,
SetUnitVector<BuildMatrixMetavars>, ApplyOperatorActions,
ApplyOperatorActions,
Labels a location in the action list that can be jumped to using Goto.
Definition Goto.hpp:40
Definition BuildMatrix.hpp:551
Set the operand to a unit vector with a '1' at the current grid point. Applying the operator to this ...
Definition BuildMatrix.hpp:415
Write result out to disk, reset operand back to zero, and keep iterating.
Definition BuildMatrix.hpp:449

◆ component_list

template<typename FieldsTag, typename FixedSourcesTag, typename OperandTag, typename OperatorAppliedToOperandTag, typename CoordsTag, typename ArraySectionIdTag = void>
template<typename Metavariables>
using LinearSolver::Actions::BuildMatrix< FieldsTag, FixedSourcesTag, OperandTag, OperatorAppliedToOperandTag, CoordsTag, ArraySectionIdTag >::component_list
Initial value:
tmpl::list<BuildMatrixSingleton<Metavariables, BuildMatrixMetavars>>

◆ register_actions

template<typename FieldsTag, typename FixedSourcesTag, typename OperandTag, typename OperatorAppliedToOperandTag, typename CoordsTag, typename ArraySectionIdTag = void>
using LinearSolver::Actions::BuildMatrix< FieldsTag, FixedSourcesTag, OperandTag, OperatorAppliedToOperandTag, CoordsTag, ArraySectionIdTag >::register_actions
Initial value:
detail::RegisterWithVolumeObserver<ArraySectionIdTag>>>
Register an observation ID with the observers.
Definition RegisterWithObservers.hpp:53

Add to the register phase to enable observations.


The documentation for this struct was generated from the following file:
  • src/ParallelAlgorithms/LinearSolver/Actions/BuildMatrix.hpp