java.lang.Object
- no.uib.cipr.matrix.distributed.BlockDiagonalPreconditioner
- - no.uib.cipr.matrix.distributed.TwoLevelPreconditioner

All Implemented Interfaces:

Preconditioner
```
@Deprecated
public class TwoLevelPreconditioner
extends BlockDiagonalPreconditioner
```
Deprecated.
the no.uib.cipr.matrix.distributed package has been deprecated because of a number of hard to fix concurrency bugs. It is distributed only for backwards compatibility, but is not recommended. The utility of this package is questionable, as it does not allow distribution of computation between JVMs or across a network. For many people, distributed computing of multiple matrices can be achieved at a user-level through the JPPF Framework. Users who need to deal with few very large matrices may wish to implement their own storage classes and solvers using JPPF, but this will not be supported directly in matrix-toolkits-java.

Two level preconditioner. Uses a block preconditioner as a subdomain solver, and algebraically constructs a coarse grid correcion operator

Constructor Summary

Constructors
Constructor	Description
`TwoLevelPreconditioner(Preconditioner prec, DistColMatrix A, DistVector z)`	Deprecated.
`TwoLevelPreconditioner(Preconditioner prec, DistRowMatrix A, DistVector z)`	Deprecated.

Method Summary

All Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`Vector`	`apply(Vector b, Vector x)`	Deprecated. Solves the approximate problem with the given right hand side.
`void`	`setMatrix(Matrix A)`	Deprecated. Sets the operator matrix for the preconditioner.
`Vector`	`transApply(Vector b, Vector x)`	Deprecated. Solves the approximate transpose problem with the given right hand side.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - TwoLevelPreconditioner
```
public TwoLevelPreconditioner(Preconditioner prec,
                              DistRowMatrix A,
                              DistVector z)
```
    Deprecated.
  - TwoLevelPreconditioner
```
public TwoLevelPreconditioner(Preconditioner prec,
                              DistColMatrix A,
                              DistVector z)
```
    Deprecated.
- Method Detail
  - apply
```
public Vector apply(Vector b,
                    Vector x)
```
    Deprecated.
    
    Description copied from interface: Preconditioner
    
    Solves the approximate problem with the given right hand side. Result is stored in given solution vector
    
    Specified by:
    
    apply in interface Preconditioner
    
    Overrides:
    
    apply in class BlockDiagonalPreconditioner
    
    Parameters:
    
    b - Right hand side of problem
    
    x - Result is stored here
    
    Returns:
    
    x
  - transApply
```
public Vector transApply(Vector b,
                         Vector x)
```
    Deprecated.
    
    Description copied from interface: Preconditioner
    
    Solves the approximate transpose problem with the given right hand side. Result is stored in given solution vector
    
    Specified by:
    
    transApply in interface Preconditioner
    
    Overrides:
    
    transApply in class BlockDiagonalPreconditioner
    
    Parameters:
    
    b - Right hand side of problem
    
    x - Result is stored here
    
    Returns:
    
    x
  - setMatrix
```
public void setMatrix(Matrix A)
```
    Deprecated.
    
    Description copied from interface: Preconditioner
    
    Sets the operator matrix for the preconditioner. This method must be called before a preconditioner is used by an iterative solver
    
    Specified by:
    
    setMatrix in interface Preconditioner
    
    Overrides:
    
    setMatrix in class BlockDiagonalPreconditioner
    
    Parameters:
    
    A - Matrix to setup the preconditioner for. Not modified

Class TwoLevelPreconditioner

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

TwoLevelPreconditioner

TwoLevelPreconditioner

Method Detail

apply

transApply

setMatrix