org.netlib.lapack
Class Slarz

java.lang.Object
  org.netlib.lapack.Slarz

public class Slarz
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
 *  =======
 *
 *  SLARZ applies a real elementary reflector H to a real M-by-N
 *  matrix C, from either the left or the right. H is represented in the

 *  form
 *
 *        H = I - tau * v * v'
 *
 *  where tau is a real scalar and v is a real vector.
 *
 *  If tau = 0, then H is taken to be the unit matrix.
 *
 *
 *  H is a product of k elementary reflectors as returned by STZRZF.
 *
 *  Arguments
 *  =========
 *
 *  SIDE    (input) CHARACTER*1
 *          = 'L': form  H * C
 *          = 'R': form  C * H
 *
 *  M       (input) INTEGER
 *          The number of rows of the matrix C.
 *
 *  N       (input) INTEGER
 *          The number of columns of the matrix C.
 *
 *  L       (input) INTEGER
 *          The number of entries of the vector V containing
 *          the meaningful part of the Householder vectors.
 *          If SIDE = 'L', M >= L >= 0, if SIDE = 'R', N >= L >= 0.
 *
 *  V       (input) REAL array, dimension (1+(L-1)*abs(INCV))
 *          The vector v in the representation of H as returned by
 *          STZRZF. V is not used if TAU = 0.
 *
 *  INCV    (input) INTEGER
 *          The increment between elements of v. INCV <> 0.
 *
 *  TAU     (input) REAL
 *          The value tau in the representation of H.
 *
 *  C       (input/output) REAL array, dimension (LDC,N)
 *          On entry, the M-by-N matrix C.
 *          On exit, C is overwritten by the matrix H * C if SIDE = 'L',

 *          or C * H if SIDE = 'R'.
 *
 *  LDC     (input) INTEGER
 *          The leading dimension of the array C. LDC >= max(1,M).
 *
 *  WORK    (workspace) REAL array, dimension
 *                         (N) if SIDE = 'L'
 *                      or (M) if SIDE = 'R'
 *
 *  Further Details
 *  ===============
 *
 *  Based on contributions by
 *    A. Petitet, Computer Science Dept., Univ. of Tenn., Knoxville, USA

 *
 *  =====================================================================
 *
 *     .. Parameters ..

Constructor Summary

Slarz()

Method Summary

static void

slarz(java.lang.String side, int m, int n, int l, float[] v, int _v_offset, int incv, float tau, float[] c, int _c_offset, int Ldc, float[] work, int _work_offset)

Methods inherited from class java.lang.Object

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

Constructor Detail

Slarz

public Slarz()

Method Detail

slarz

public static void slarz(java.lang.String side,
                         int m,
                         int n,
                         int l,
                         float[] v,
                         int _v_offset,
                         int incv,
                         float tau,
                         float[] c,
                         int _c_offset,
                         int Ldc,
                         float[] work,
                         int _work_offset)