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Class org.netlib.lapack.DLASQ4

java.lang.Object
   |
   +----org.netlib.lapack.DLASQ4

public class DLASQ4

extends Object

DLASQ4 is a simplified interface to the JLAPACK routine dlasq4.
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
 *     =======
 *
 *     DLASQ4 estimates TAU, the smallest eigenvalue of a matrix. This
 *     routine improves the input value of SUP which is an upper bound
 *     for the smallest eigenvalue for this matrix .
 *
 *     Arguments
 *     =========
 *
 *  N       (input) INTEGER
 *          On entry, N specifies the number of rows and columns
 *          in the matrix. N must be at least 0.
 *
 *  Q       (input) DOUBLE PRECISION array, dimension (N)
 *          Q array
 *
 *  E       (input) DOUBLE PRECISION array, dimension (N)
 *          E array
 *
 *  TAU     (output) DOUBLE PRECISION
 *          Estimate of the shift
 *
 *  SUP     (input/output) DOUBLE PRECISION
 *          Upper bound for the smallest singular value
 *
 *  =====================================================================
 *
 *     .. Parameters ..

DLASQ4()

DLASQ4(int, double[], double[], doubleW, doubleW)

 public DLASQ4()

 public static void DLASQ4(int n,
                           double q[],
                           double e[],
                           doubleW tau,
                           doubleW sup)

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