extended by org.netlib.lapack.DPPTRS

public class DPPTRS
extends java.lang.Object

DPPTRS is a simplified interface to the JLAPACK routine dpptrs.
This interface converts Java-style 2D row-major arrays into
the 1D column-major linearized arrays expected by the lower
level JLAPACK routines.  Using this interface also allows you
to omit offset and leading dimension arguments.  However, because
of these conversions, these routines will be slower than the low
level ones.  Following is the description from the original Fortran
source.  Contact with any questions.

* .. * * Purpose * ======= * * DPPTRS solves a system of linear equations A*X = B with a symmetric * positive definite matrix A in packed storage using the Cholesky * factorization A = U**T*U or A = L*L**T computed by DPPTRF. * * Arguments * ========= * * UPLO (input) CHARACTER*1 * = 'U': Upper triangle of A is stored; * = 'L': Lower triangle of A is stored. * * N (input) INTEGER * The order of the matrix A. N >= 0. * * NRHS (input) INTEGER * The number of right hand sides, i.e., the number of columns * of the matrix B. NRHS >= 0. * * AP (input) DOUBLE PRECISION array, dimension (N*(N+1)/2) * The triangular factor U or L from the Cholesky factorization * A = U**T*U or A = L*L**T, packed columnwise in a linear * array. The j-th column of U or L is stored in the array AP * as follows: * if UPLO = 'U', AP(i + (j-1)*j/2) = U(i,j) for 1<=i<=j; * if UPLO = 'L', AP(i + (j-1)*(2n-j)/2) = L(i,j) for j<=i<=n. * * B (input/output) DOUBLE PRECISION array, dimension (LDB,NRHS) * On entry, the right hand side matrix B. * On exit, the solution matrix X. * * LDB (input) INTEGER * The leading dimension of the array B. LDB >= max(1,N). * * INFO (output) INTEGER * = 0: successful exit * < 0: if INFO = -i, the i-th argument had an illegal value * * ===================================================================== * * .. Local Scalars ..

Constructor Summary
Method Summary
static void DPPTRS(java.lang.String uplo, int n, int nrhs, double[] ap, double[][] b, intW info)
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail


public DPPTRS()
Method Detail


public static void DPPTRS(java.lang.String uplo,
                          int n,
                          int nrhs,
                          double[] ap,
                          double[][] b,
                          intW info)