ItrSmootherCSRpoly.c File Reference

Smoothers for dCSRmat matrices using poly. approx. to A^{-1}. More...

#include <math.h>
#include <time.h>
#include <float.h>
#include <limits.h>
#include "fasp.h"
#include "fasp_functs.h"

Go to the source code of this file.

Functions
void	fasp_smoother_dcsr_poly (dCSRmat *Amat, dvector *brhs, dvector *usol, INT n, INT ndeg, INT L)
	poly approx to A^{-1} as MG smoother More...
void	fasp_smoother_dcsr_poly_old (dCSRmat *Amat, dvector *brhs, dvector *usol, INT n, INT ndeg, INT L)
	poly approx to A^{-1} as MG smoother: JK&LTZ2010 More...

Detailed Description

Smoothers for dCSRmat matrices using poly. approx. to A^{-1}.

Note

This file contains Level-2 (Itr) functions. It requires: AuxArray.c, AuxMemory.c, AuxThreads.c, BlaArray.c, and BlaSpmvCSR.c

Reference: Johannes K. Kraus, Panayot S. Vassilevski, Ludmil T. Zikatanov Polynomial of best uniform approximation to $x^{-1}$ and smoothing in two-leve methods, 2013.

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Copyright (C) 2009–Present by the FASP team. All rights reserved.

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

Warning

Do NOT use auto-indentation in this file!

// TODO: Need to optimize routines here! –Chensong

Definition in file ItrSmootherCSRpoly.c.

Function Documentation

fasp_smoother_dcsr_poly()

void fasp_smoother_dcsr_poly	(	dCSRmat *	Amat,
		dvector *	brhs,
		dvector *	usol,
		INT	n,
		INT	ndeg,
		INT	L
	)

poly approx to A^{-1} as MG smoother

Parameters

Amat	Pointer to stiffness matrix, consider square matrix.
brhs	Pointer to right hand side
usol	Pointer to solution
n	Problem size
ndeg	Degree of poly
L	Number of iterations

Author

Fei Cao, Xiaozhe Hu

Date

05/24/2012

Definition at line 67 of file ItrSmootherCSRpoly.c.

fasp_smoother_dcsr_poly_old()

void fasp_smoother_dcsr_poly_old	(	dCSRmat *	Amat,
		dvector *	brhs,
		dvector *	usol,
		INT	n,
		INT	ndeg,
		INT	L
	)

poly approx to A^{-1} as MG smoother: JK&LTZ2010

Parameters

Amat	Pointer to stiffness matrix
brhs	Pointer to right hand side
usol	Pointer to solution
n	Problem size
ndeg	Degree of poly
L	Number of iterations

Author

James Brannick and Ludmil T Zikatanov

Date

06/28/2010

Modified by Chunsheng Feng, Zheng Li on 10/18/2012

Definition at line 165 of file ItrSmootherCSRpoly.c.