SuperLU 6.0.1
Macros | Functions
cfgmr.c File Reference

Flexible GMRES from ITSOL developed by Yousef Saad. More...

#include "slu_cdefs.h"
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Macros

#define epsmac   1.0e-16
 

Functions

void cdotc_ (complex *, int *, complex[], int *, complex[], int *)
 
float scnrm2_ (int *, complex[], int *)
 
int cfgmr (int n, void(*cmatvec)(complex, complex[], complex, complex[]), void(*cpsolve)(int, complex[], complex[]), complex *rhs, complex *sol, double tol, int im, int *itmax, FILE *fits)
 Simple version of the ARMS preconditioned FGMRES algorithm. More...
 

Macro Definition Documentation

◆ epsmac

#define epsmac   1.0e-16

Function Documentation

◆ cdotc_()

void cdotc_ ( complex ,
int *  ,
complex  [],
int *  ,
complex  [],
int *   
)

◆ cfgmr()

int cfgmr ( int  n,
void(*)(complex, complex[], complex, complex[])  cmatvec,
void(*)(int, complex[], complex[])  cpsolve,
complex rhs,
complex sol,
double  tol,
int  im,
int *  itmax,
FILE *  fits 
)

Y. S. Dec. 2000. – Apr. 2008

internal work arrays: vv = work array of length [im+1][n] (used to store the Arnoldi basis) hh = work array of length [im][im+1] (Householder matrix) z = work array of length [im][n] to store preconditioned vectors

Parameters
[in]nDimension of vectors and matrices.
[in]cmatvecOperation for matrix-vector multiplication.
[in]cpsolve(right) preconditioning operation. Can be a NULL pointer (GMRES without preconditioner)
[in]rhsReal vector of length n containing the right hand side.
[in,out]solIn: Real vector of length n containing an initial guess to the solution on input. Out: Contains an approximate solution (upon successful return).
[in]tolTolerance for stopping iteration
[in]imKrylov subspace dimension
[in,out]itmaxIn: max number of iterations allowed. Out: number of steps required to converge.
[in]fitsIf NULL, no output. If not NULL, file handle to output "resid vs time and its".
Returns
Whether the algorithm finished successfully.
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◆ scnrm2_()

float scnrm2_ ( int *  ,
complex  [],
int *   
)