org.netlib.lapack
Class Slagtm

java.lang.Object
  org.netlib.lapack.Slagtm

public class Slagtm
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
 *  =======
 *
 *  SLAGTM performs a matrix-vector product of the form
 *
 *     B := alpha * A * X + beta * B
 *
 *  where A is a tridiagonal matrix of order N, B and X are N by NRHS
 *  matrices, and alpha and beta are real scalars, each of which may be
 *  0., 1., or -1.
 *
 *  Arguments
 *  =========
 *
 *  TRANS   (input) CHARACTER
 *          Specifies the operation applied to A.
 *          = 'N':  No transpose, B := alpha * A * X + beta * B
 *          = 'T':  Transpose,    B := alpha * A'* X + beta * B
 *          = 'C':  Conjugate transpose = Transpose
 *
 *  N       (input) INTEGER
 *          The order of the matrix A.  N >= 0.
 *
 *  NRHS    (input) INTEGER
 *          The number of right hand sides, i.e., the number of columns
 *          of the matrices X and B.
 *
 *  ALPHA   (input) REAL
 *          The scalar alpha.  ALPHA must be 0., 1., or -1.; otherwise,
 *          it is assumed to be 0.
 *
 *  DL      (input) REAL array, dimension (N-1)
 *          The (n-1) sub-diagonal elements of T.
 *
 *  D       (input) REAL array, dimension (N)
 *          The diagonal elements of T.
 *
 *  DU      (input) REAL array, dimension (N-1)
 *          The (n-1) super-diagonal elements of T.
 *
 *  X       (input) REAL array, dimension (LDX,NRHS)
 *          The N by NRHS matrix X.
 *  LDX     (input) INTEGER
 *          The leading dimension of the array X.  LDX >= max(N,1).
 *
 *  BETA    (input) REAL
 *          The scalar beta.  BETA must be 0., 1., or -1.; otherwise,
 *          it is assumed to be 1.
 *
 *  B       (input/output) REAL array, dimension (LDB,NRHS)
 *          On entry, the N by NRHS matrix B.
 *          On exit, B is overwritten by the matrix expression
 *          B := alpha * A * X + beta * B.
 *
 *  LDB     (input) INTEGER
 *          The leading dimension of the array B.  LDB >= max(N,1).
 *
 *  =====================================================================
 *
 *     .. Parameters ..

Constructor Summary

Slagtm()

Method Summary

static void

slagtm(java.lang.String trans, int n, int nrhs, float alpha, float[] dl, int _dl_offset, float[] d, int _d_offset, float[] du, int _du_offset, float[] x, int _x_offset, int ldx, float beta, float[] b, int _b_offset, int ldb)

Methods inherited from class java.lang.Object

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

Constructor Detail

Slagtm

public Slagtm()

Method Detail

slagtm

public static void slagtm(java.lang.String trans,
                          int n,
                          int nrhs,
                          float alpha,
                          float[] dl,
                          int _dl_offset,
                          float[] d,
                          int _d_offset,
                          float[] du,
                          int _du_offset,
                          float[] x,
                          int _x_offset,
                          int ldx,
                          float beta,
                          float[] b,
                          int _b_offset,
                          int ldb)