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Class org.netlib.lapack.Dqrt11

java.lang.Object
   |
   +----org.netlib.lapack.Dqrt11

public class Dqrt11

extends Object

Following is the description from the original
Fortran source.  For each array argument, the Java
version will include an integer offset parameter, so
the arguments may not match the description exactly.
Contact seymour@cs.utk.edu with any questions.

 *     ..
 *
 *  Purpose
 *  =======
 *
 *  DQRT11 computes the test ratio
 *
 *        || Q'*Q - I || / (eps * m)
 *
 *  where the orthogonal matrix Q is represented as a product of
 *  elementary transformations.  Each transformation has the form
 *
 *     H(k) = I - tau(k) v(k) v(k)'
 *
 *  where tau(k) is stored in TAU(k) and v(k) is an m-vector of the form
 *  [ 0 ... 0 1 x(k) ]', where x(k) is a vector of length m-k stored
 *  in A(k+1:m,k).
 *
 *  Arguments
 *  =========
 *
 *  M       (input) INTEGER
 *          The number of rows of the matrix A.
 *
 *  K       (input) INTEGER
 *          The number of columns of A whose subdiagonal entries
 *          contain information about orthogonal transformations.
 *
 *  A       (input) DOUBLE PRECISION array, dimension (LDA,K)
 *          The (possibly partial) output of a QR reduction routine.
 *
 *  LDA     (input) INTEGER
 *          The leading dimension of the array A.
 *
 *  TAU     (input) DOUBLE PRECISION array, dimension (K)
 *          The scaling factors tau for the elementary transformations as
 *          computed by the QR factorization routine.
 *
 *  WORK    (workspace) DOUBLE PRECISION array, dimension (LWORK)
 *
 *  LWORK   (input) INTEGER
 *          The length of the array WORK.  LWORK >= M*M + M.
 *
 *  =====================================================================
 *
 *     .. Parameters ..

Dqrt11()

dqrt11(int, int, double[], int, int, double[], int, double[], int, int)

 public Dqrt11()

 public static double dqrt11(int m,
                             int k,
                             double a[],
                             int _a_offset,
                             int lda,
                             double tau[],
                             int _tau_offset,
                             double work[],
                             int _work_offset,
                             int lwork)

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