chrono::modal::callback_Ax_sparse_shiftinvert Class Reference


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

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 
Asunshifted matrix A
Bsunshifted matrix B
shiftshift (sigma in the equation)
mlinear_solveroptional 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 
A_xoutput: result of A*x
xinput: x in A*x

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