org.netlib.lapack
Class DPBTRS

java.lang.Object
  org.netlib.lapack.DPBTRS

public class DPBTRS
extends java.lang.Object

DPBTRS is a simplified interface to the JLAPACK routine dpbtrs.
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 seymour@cs.utk.edu with any questions.

 *     ..
 *
 *  Purpose
 *  =======
 *
 *  DPBTRS solves a system of linear equations A*X = B with a symmetric
 *  positive definite band matrix A using the Cholesky factorization
 *  A = U**T*U or A = L*L**T computed by DPBTRF.
 *
 *  Arguments
 *  =========
 *
 *  UPLO    (input) CHARACTER*1
 *          = 'U':  Upper triangular factor stored in AB;
 *          = 'L':  Lower triangular factor stored in AB.
 *
 *  N       (input) INTEGER
 *          The order of the matrix A.  N >= 0.
 *
 *  KD      (input) INTEGER
 *          The number of superdiagonals of the matrix A if UPLO = 'U',
 *          or the number of subdiagonals if UPLO = 'L'.  KD >= 0.
 *
 *  NRHS    (input) INTEGER
 *          The number of right hand sides, i.e., the number of columns
 *          of the matrix B.  NRHS >= 0.
 *
 *  AB      (input) DOUBLE PRECISION array, dimension (LDAB,N)
 *          The triangular factor U or L from the Cholesky factorization

 *          A = U**T*U or A = L*L**T of the band matrix A, stored in the

 *          first KD+1 rows of the array.  The j-th column of U or L is
 *          stored in the j-th column of the array AB as follows:
 *          if UPLO ='U', AB(kd+1+i-j,j) = U(i,j) for max(1,j-kd)<=i<=j;

 *          if UPLO ='L', AB(1+i-j,j)    = L(i,j) for j<=i<=min(n,j+kd).

 *
 *  LDAB    (input) INTEGER
 *          The leading dimension of the array AB.  LDAB >= KD+1.
 *
 *  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

DPBTRS()

Method Summary

static void

DPBTRS(java.lang.String uplo, int n, int kd, int nrhs, double[][] ab, double[][] b, intW info)

Methods inherited from class java.lang.Object

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

Constructor Detail

DPBTRS

public DPBTRS()

Method Detail

DPBTRS

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