org.netlib.lapack
Class Slazq4
java.lang.Object
org.netlib.lapack.Slazq4
public class Slazq4
- 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
* =======
*
* SLAZQ4 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.
*
* N0IN (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.
*
* G (input/output) REAL
* G is passed as an argument in order to save its value between
* calls to SLAZQ4
*
* Further Details
* ===============
* CNST1 = 9/16
*
* This is a thread safe version of SLASQ4, which passes G through the
* argument list in place of declaring G in a SAVE statment.
*
* =====================================================================
*
* .. Parameters ..
Method Summary |
static void |
slazq4(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,
floatW g)
|
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Slazq4
public Slazq4()
slazq4
public static void slazq4(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,
floatW g)