chrono::modal::callback_Ax_sparse_shiftinvert Class Reference

Description

The callback to be used for "A*x" where for shift&invert is: A = (As - sigma Bs)/Bs , so A*x = (As - sigma Bs)/(Bs*x), just like a linear system with coefficient matrix (As - sigma Bs) and known rhs Bs*x.

#include <ChKrylovSchurEig.h>

Inheritance diagram for chrono::modal::callback_Ax_sparse_shiftinvert:

Collaboration diagram for chrono::modal::callback_Ax_sparse_shiftinvert:

Public Member Functions
	callback_Ax_sparse_shiftinvert (const chrono::ChSparseMatrix &As, const chrono::ChSparseMatrix &Bs, double shift, ChDirectSolverLS *mlinear_solver=0)
void	compute (chrono::ChVectorDynamic< std::complex< double >> &A_x, const chrono::ChVectorDynamic< std::complex< double >> &x) override
Public Member Functions inherited from chrono::modal::callback_Ax
virtual void	compute (ChVectorDynamic< std::complex< double >> &A_x, const ChVectorDynamic< std::complex< double >> &x)

Public Attributes
ChDirectSolverLS *	linear_solver
chrono::ChSparseMatrix	Bd
float	default_solver
double	sigma

Constructor & Destructor Documentation

callback_Ax_sparse_shiftinvert()

chrono::modal::callback_Ax_sparse_shiftinvert::callback_Ax_sparse_shiftinvert	(	const chrono::ChSparseMatrix &	As,
		const chrono::ChSparseMatrix &	Bs,
		double	shift,
		ChDirectSolverLS *	mlinear_solver = 0
	)

Parameters

As	unshifted matrix A
Bs	unshifted matrix B
shift	shift (sigma in the equation)
mlinear_solver	optional direct solver/factorization. Default is ChSolverSparseQR

Member Function Documentation

compute()

void chrono::modal::callback_Ax_sparse_shiftinvert::compute ( chrono::ChVectorDynamic< std::complex< double >> &  A_x, const chrono::ChVectorDynamic< std::complex< double >> &  x  )

override

Parameters

A_x	output: result of A*x
x	input: x in A*x

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The documentation for this class was generated from the following files:

• /builds/uwsbel/chrono/src/chrono_modal/ChKrylovSchurEig.h
• /builds/uwsbel/chrono/src/chrono_modal/ChKrylovSchurEig.cpp