KryPgcr.c File Reference

Krylov subspace methods – Preconditioned GCR. More...

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

Go to the source code of this file.

Functions
INT	fasp_solver_dcsr_pgcr (dCSRmat *A, dvector *b, dvector *x, precond *pc, const REAL tol, const REAL abstol, const INT MaxIt, const SHORT restart, const SHORT StopType, const SHORT PrtLvl)
	A preconditioned GCR method for solving Au=b. More...
INT	fasp_solver_dblc_pgcr (dBLCmat *A, dvector *b, dvector *x, precond *pc, const REAL tol, const REAL abstol, const INT MaxIt, const SHORT restart, const SHORT StopType, const SHORT PrtLvl)
	A preconditioned GCR method for solving Au=b. More...

Detailed Description

Krylov subspace methods – Preconditioned GCR.

Note

This file contains Level-3 (Kry) functions. It requires: AuxArray.c, AuxMemory.c, AuxMessage.c, BlaArray.c, BlaSpmvCSR.c, and BlaVector.c

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Copyright (C) 2014–Present by the FASP team. All rights reserved.

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

TODO: abstol not used yet! –Chensong

Definition in file KryPgcr.c.

Function Documentation

fasp_solver_dblc_pgcr()

INT fasp_solver_dblc_pgcr	(	dBLCmat *	A,
		dvector *	b,
		dvector *	x,
		precond *	pc,
		const REAL	tol,
		const REAL	abstol,
		const INT	MaxIt,
		const SHORT	restart,
		const SHORT	StopType,
		const SHORT	PrtLvl
	)

A preconditioned GCR method for solving Au=b.

Parameters

A	Pointer to coefficient matrix
b	Pointer to dvector of right hand side
x	Pointer to dvector of dofs
pc	Pointer to structure of precondition (precond)
tol	Tolerance for relative residual
abstol	Tolerance for absolute residual
MaxIt	Maximal number of iterations
restart	Restart number for GCR
StopType	Stopping type
PrtLvl	How much information to print out

Returns

Iteration number if converges; ERROR otherwise.

Reference: YVAN NOTAY "AN AGGREGATION-BASED ALGEBRAIC MULTIGRID METHOD"

Author

Zheng Li

Date

12/23/2014

Definition at line 254 of file KryPgcr.c.

fasp_solver_dcsr_pgcr()

INT fasp_solver_dcsr_pgcr	(	dCSRmat *	A,
		dvector *	b,
		dvector *	x,
		precond *	pc,
		const REAL	tol,
		const REAL	abstol,
		const INT	MaxIt,
		const SHORT	restart,
		const SHORT	StopType,
		const SHORT	PrtLvl
	)

A preconditioned GCR method for solving Au=b.

Parameters

A	Pointer to coefficient matrix
b	Pointer to dvector of right hand side
x	Pointer to dvector of dofs
pc	Pointer to structure of precondition (precond)
tol	Tolerance for relative residual
abstol	Tolerance for absolute residual
MaxIt	Maximal number of iterations
restart	Restart number for GCR
StopType	Stopping type
PrtLvl	How much information to print out

Returns

Iteration number if converges; ERROR otherwise.

Reference: YVAN NOTAY "AN AGGREGATION-BASED ALGEBRAIC MULTIGRID METHOD"

Author

Zheng Li

Date

12/23/2014

Definition at line 55 of file KryPgcr.c.