Class BlockDiagonalPreconditioner

java.lang.Object
no.uib.cipr.matrix.distributed.BlockDiagonalPreconditioner
All Implemented Interfaces:
Preconditioner
Direct Known Subclasses:
TwoLevelPreconditioner

@Deprecated public class BlockDiagonalPreconditioner extends Object implements Preconditioner
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.
Block diagonal preconditioner
  • Constructor Details

    • 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 on A.getBlock()
  • Method Details

    • 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
      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
      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
      Parameters:
      A - Matrix to setup the preconditioner for. Not modified