Package de.labathome.trustconstr.sparse

Class DenseSolve.LUFactor

java.lang.Object

de.labathome.trustconstr.sparse.DenseSolve.LUFactor

Enclosing class:

DenseSolve

public static final class DenseSolve.LUFactor
extends Object

Factorisation of a square matrix A ready to repeatedly solve(double[]) against right-hand sides.

The factor stores LU in the LAPACK column-major layout used by dgesv; calling solve costs only a forward/back substitution.

Method Summary

Modifier and Type	Method	Description
int	n()
double[]	solve(double[] b)	Solve A x = b reusing the captured LU.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

solve

public double[] solve(double[] b)

Solve A x = b reusing the captured LU.

Parameters:

b - length-n right-hand side; not modified

Returns:

length-n solution x

n

public int n()

Returns:

the dimension of the factored matrix