AuxGivens.c File Reference

Givens transformation. More...

#include <math.h>
#include "fasp.h"
#include "fasp_functs.h"

Go to the source code of this file.

Functions
void	fasp_aux_givens (const REAL beta, const dCSRmat *H, dvector *y, REAL *work)
	Perform Givens rotations to compute y |beta*e_1- H*y|. More...

Detailed Description

Givens transformation.

Note

This file contains Level-0 (Aux) functions.

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Copyright (C) 2008–Present by the FASP team. All rights reserved.

Released under the terms of the GNU Lesser General Public License 3.0 or later.

Definition in file AuxGivens.c.

Function Documentation

fasp_aux_givens()

void fasp_aux_givens	(	const REAL	beta,
		const dCSRmat *	H,
		dvector *	y,
		REAL *	work
	)

Perform Givens rotations to compute y |beta*e_1- H*y|.

Parameters

beta	Norm of residual r_0
H	Upper Hessenberg dCSRmat matrix: (m+1)*m
y	Minimizer of |beta*e_1- H*y|
work	Temporary work array

Author

Xuehai Huang

Date

10/19/2008

Definition at line 36 of file AuxGivens.c.