org.netlib.lapack
Class Slasq4

java.lang.Object
  org.netlib.lapack.Slasq4

public class Slasq4
extends java.lang.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
 *  =======
 *
 *  SLASQ4 computes an approximation TAU to the smallest eigenvalue 
 *  using values of d from the previous transform.
 *
 *  I0    (input) INTEGER
 *        First index.
 *
 *  N0    (input) INTEGER
 *        Last index.
 *
 *  Z     (input) REAL array, dimension ( 4*N )
 *        Z holds the qd array.
 *
 *  PP    (input) INTEGER
 *        PP=0 for ping, PP=1 for pong.
 *
 *  NOIN  (input) INTEGER
 *        The value of N0 at start of EIGTEST.
 *
 *  DMIN  (input) REAL
 *        Minimum value of d.
 *
 *  DMIN1 (input) REAL
 *        Minimum value of d, excluding D( N0 ).
 *
 *  DMIN2 (input) REAL
 *        Minimum value of d, excluding D( N0 ) and D( N0-1 ).
 *
 *  DN    (input) REAL
 *        d(N)
 *
 *  DN1   (input) REAL
 *        d(N-1)
 *
 *  DN2   (input) REAL
 *        d(N-2)
 *
 *  TAU   (output) REAL
 *        This is the shift.
 *
 *  TTYPE (output) INTEGER
 *        Shift type.
 *
 *  Further Details
 *  ===============
 *  CNST1 = 9/16
 *
 *  =====================================================================
 *
 *     .. Parameters ..

Field Summary

static float

g

Constructor Summary

Slasq4()

Method Summary

static void

slasq4(int i0, int n0, float[] z, int _z_offset, int pp, int n0in, float dmin, float dmin1, float dmin2, float dn, float dn1, float dn2, floatW tau, intW ttype)

Methods inherited from class java.lang.Object

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

Field Detail

g

public static float g

Constructor Detail

Slasq4

public Slasq4()

Method Detail

slasq4

public static void slasq4(int i0,
                          int n0,
                          float[] z,
                          int _z_offset,
                          int pp,
                          int n0in,
                          float dmin,
                          float dmin1,
                          float dmin2,
                          float dn,
                          float dn1,
                          float dn2,
                          floatW tau,
                          intW ttype)