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Class org.netlib.lapack.Dlanv2

java.lang.Object
   |
   +----org.netlib.lapack.Dlanv2

public class Dlanv2

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
 *  =======
 *
 *  DLANV2 computes the Schur factorization of a real 2-by-2 nonsymmetric
 *  matrix in standard form:
 *
 *       [ A  B ] = [ CS -SN ] [ AA  BB ] [ CS  SN ]
 *       [ C  D ]   [ SN  CS ] [ CC  DD ] [-SN  CS ]
 *
 *  where either
 *  1) CC = 0 so that AA and DD are real eigenvalues of the matrix, or
 *  2) AA = DD and BB*CC < 0, so that AA + or - sqrt(BB*CC) are complex
 *  conjugate eigenvalues.
 *
 *  Arguments
 *  =========
 *
 *  A       (input/output) DOUBLE PRECISION
 *  B       (input/output) DOUBLE PRECISION
 *  C       (input/output) DOUBLE PRECISION
 *  D       (input/output) DOUBLE PRECISION
 *          On entry, the elements of the input matrix.
 *          On exit, they are overwritten by the elements of the
 *          standardised Schur form.
 *
 *  RT1R    (output) DOUBLE PRECISION
 *  RT1I    (output) DOUBLE PRECISION
 *  RT2R    (output) DOUBLE PRECISION
 *  RT2I    (output) DOUBLE PRECISION
 *          The real and imaginary parts of the eigenvalues. If the
 *          eigenvalues are both real, abs(RT1R) >= abs(RT2R); if the
 *          eigenvalues are a complex conjugate pair, RT1I > 0.
 *
 *  CS      (output) DOUBLE PRECISION
 *  SN      (output) DOUBLE PRECISION
 *          Parameters of the rotation matrix.
 *
 *  =====================================================================
 *
 *     .. Parameters ..

Dlanv2()

dlanv2(doubleW, doubleW, doubleW, doubleW, doubleW, doubleW, doubleW, doubleW, doubleW, doubleW)

 public Dlanv2()

 public static void dlanv2(doubleW a,
                           doubleW b,
                           doubleW c,
                           doubleW d,
                           doubleW rt1r,
                           doubleW rt1i,
                           doubleW rt2r,
                           doubleW rt2i,
                           doubleW cs,
                           doubleW sn)

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