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java.lang.Objectno.uib.cipr.matrix.sparse.ILUT
public class ILUT
ILU preconditioner with fill-in. Uses the dual threshold approach of Saad.
Constructor Summary | |
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ILUT(FlexCompRowMatrix LU)
Sets up the preconditioner for the given matrix. |
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ILUT(FlexCompRowMatrix LU,
double tau,
int p)
Sets up the preconditioner for the given matrix |
Method Summary | |
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Vector |
apply(Vector b,
Vector x)
Solves the approximate problem with the given right hand side. |
void |
setMatrix(Matrix A)
Sets the operator matrix for the preconditioner. |
Vector |
transApply(Vector b,
Vector x)
Solves the approximate transpose problem with the given right hand side. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public ILUT(FlexCompRowMatrix LU, double tau, int p)
LU
- Matrix to use internally. For best performance, its non-zero
pattern should conform to that of the system matrixtau
- Drop tolerancep
- Number of entries to keep on each row in of the factored
matrix. This is in addition to the entries of the original
matrixpublic ILUT(FlexCompRowMatrix LU)
LU
- Matrix to use internally. For best performance, its non-zero
pattern should conform to that of the system matrixMethod Detail |
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public Vector apply(Vector b, Vector x)
Preconditioner
apply
in interface Preconditioner
b
- Right hand side of problemx
- Result is stored here
public Vector transApply(Vector b, Vector x)
Preconditioner
transApply
in interface Preconditioner
b
- Right hand side of problemx
- Result is stored here
public void setMatrix(Matrix A)
Preconditioner
setMatrix
in interface Preconditioner
A
- Matrix to setup the preconditioner for. Not modified
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