Package no.uib.cipr.matrix.distributed
Class BlockDiagonalPreconditioner
- java.lang.Object
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- no.uib.cipr.matrix.distributed.BlockDiagonalPreconditioner
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- All Implemented Interfaces:
Preconditioner
- Direct Known Subclasses:
TwoLevelPreconditioner
@Deprecated public class BlockDiagonalPreconditioner extends java.lang.Object implements Preconditioner
Deprecated.theno.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.Block diagonal preconditioner
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Constructor Summary
Constructors Constructor Description BlockDiagonalPreconditioner(Preconditioner prec)
Deprecated.Constructor for BlockDiagonalPreconditioner
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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.
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Constructor Detail
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BlockDiagonalPreconditioner
public BlockDiagonalPreconditioner(Preconditioner prec)
Deprecated.Constructor for BlockDiagonalPreconditioner- Parameters:
prec
- Preconditioner to apply on the blocks. As this preconditioner is meant to be used for distributed memory matrices, the preconditioner should be constructed onA.getBlock()
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Method Detail
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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 interfacePreconditioner
- Parameters:
b
- Right hand side of problemx
- Result is stored here- Returns:
- x
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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 interfacePreconditioner
- Parameters:
b
- Right hand side of problemx
- Result is stored here- Returns:
- x
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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 interfacePreconditioner
- Parameters:
A
- Matrix to setup the preconditioner for. Not modified
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