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Class org.netlib.lapack.DLAVSP

java.lang.Object
   |
   +----org.netlib.lapack.DLAVSP

public class DLAVSP

extends Object

DLAVSP is a simplified interface to the JLAPACK routine dlavsp.
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
 *  =======
 *
 *  DLAVSP  performs one of the matrix-vector operations
 *     x := A*x  or  x := A'*x,
 *  where x is an N element vector and  A is one of the factors
 *  from the block U*D*U' or L*D*L' factorization computed by DSPTRF.
 *
 *  If TRANS = 'N', multiplies by U  or U * D  (or L  or L * D)
 *  If TRANS = 'T', multiplies by U' or D * U' (or L' or D * L' )
 *  If TRANS = 'C', multiplies by U' or D * U' (or L' or D * L' )
 *
 *  Arguments
 *  ==========
 *
 *  UPLO    (input) CHARACTER*1
 *          Specifies whether the factor stored in A is upper or lower
 *          triangular.
 *          = 'U':  Upper triangular
 *          = 'L':  Lower triangular
 *
 *  TRANS   (input) CHARACTER*1
 *          Specifies the operation to be performed:
 *          = 'N':  x := A*x
 *          = 'T':  x := A'*x
 *          = 'C':  x := A'*x
 *
 *  DIAG    (input) CHARACTER*1
 *          Specifies whether or not the diagonal blocks are unit
 *          matrices.  If the diagonal blocks are assumed to be unit,
 *          then A = U or A = L, otherwise A = U*D or A = L*D.
 *          = 'U':  Diagonal blocks are assumed to be unit matrices.
 *          = 'N':  Diagonal blocks are assumed to be non-unit matrices.
 *
 *  N       (input) INTEGER
 *          The number of rows and columns of the matrix A.  N >= 0.
 *
 *  NRHS    (input) INTEGER
 *          The number of right hand sides, i.e., the number of vectors
 *          x to be multiplied by A.  NRHS >= 0.
 *
 *  A       (input) DOUBLE PRECISION array, dimension (N*(N+1)/2)
 *          The block diagonal matrix D and the multipliers used to
 *          obtain the factor U or L, stored as a packed triangular
 *          matrix as computed by DSPTRF.
 *
 *  IPIV    (input) INTEGER array, dimension (N)
 *          The pivot indices from DSPTRF.
 *
 *  B       (input/output) DOUBLE PRECISION array, dimension (LDB,NRHS)
 *          On entry, B contains NRHS vectors of length N.
 *          On exit, B is overwritten with the product A * B.
 *
 *  LDB     (input) INTEGER
 *          The leading dimension of the array B.  LDB >= max(1,N).
 *
 *  INFO    (output) INTEGER
 *          = 0: successful exit
 *          < 0: if INFO = -k, the k-th argument had an illegal value
 *
 *  =====================================================================
 *
 *     .. Parameters ..

DLAVSP()

DLAVSP(String, String, String, int, int, double[], int[], double[][], intW)

 public DLAVSP()

 public static void DLAVSP(String uplo,
                           String trans,
                           String diag,
                           int n,
                           int nrhs,
                           double a[],
                           int ipiv[],
                           double b[][],
                           intW info)

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