lanTrbounds.c File Reference

A more robust algorithm to give bounds of spectrum based on TR Lanczos. More...

#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <string.h>
#include <float.h>
#include "def.h"
#include "blaslapack.h"
#include "struct.h"
#include "internal_proto.h"

Go to the source code of this file.

Macros
#define	COMP_RES   0

Functions
int	LanTrbounds (int lanm, int maxit, double tol, double *vinit, int bndtype, double *lammin, double *lammax, FILE *fstats)
	Lanczos process for eigenvalue bounds [Thick restart version]. More...

Detailed Description

A more robust algorithm to give bounds of spectrum based on TR Lanczos.

Definition in file lanTrbounds.c.

Macro Definition Documentation

#define COMP_RES   0

Definition at line 11 of file lanTrbounds.c.

Function Documentation

int LanTrbounds	(	int	lanm,
		int	maxit,
		double	tol,
		double *	vinit,
		int	bndtype,
		double *	lammin,
		double *	lammax,
		FILE *	fstats
	)

Lanczos process for eigenvalue bounds [Thick restart version].

Parameters

[in]	lanm	Dimension of Krylov subspace [restart dimension]
[in]	maxit	max Num of outer Lanczos iterations (restarts) allowed – Each restart may or use the full lanm lanczos steps or fewer.
[in]	tol	tolerance for convergence
[in]	vinit	initial vector for Lanczos – [optional]
[in]	bndtype	Type of bound >1 for kato-temple, otherwise simple
[out]	lammin	Lower bound of the spectrum
[out]	lammax	Upper bound of the spectrum
[out]	fstats	File stream which stats are printed to

Returns

Returns 0 on success

Definition at line 38 of file lanTrbounds.c.

References Calloc, CGS_DGKS(), CGS_DGKS2(), DAXPY(), DCOPY(), DDOT(), DGEMV(), DNRM2(), DSCAL(), evsldata, _evsldata::ifGenEv, Malloc, min, _evsldata::n, NGS_MAX, orthTol, rand_double(), and SymEigenSolver().

Referenced by evsl_lanbounds(), and main().

Here is the call graph for this function:

Here is the caller graph for this function: