org.netlib.lapack
Class Dlagtm

java.lang.Object
  extended by org.netlib.lapack.Dlagtm

public class Dlagtm
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 * ======= * * DLAGTM 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) DOUBLE PRECISION * The scalar alpha. ALPHA must be 0., 1., or -1.; otherwise, * it is assumed to be 0. * * DL (input) DOUBLE PRECISION array, dimension (N-1) * The (n-1) sub-diagonal elements of T. * * D (input) DOUBLE PRECISION array, dimension (N) * The diagonal elements of T. * * DU (input) DOUBLE PRECISION array, dimension (N-1) * The (n-1) super-diagonal elements of T. * * X (input) DOUBLE PRECISION 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) DOUBLE PRECISION * The scalar beta. BETA must be 0., 1., or -1.; otherwise, * it is assumed to be 1. * * B (input/output) DOUBLE PRECISION 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
Dlagtm()
           
 
Method Summary
static void dlagtm(java.lang.String trans, int n, int nrhs, double alpha, double[] dl, int _dl_offset, double[] d, int _d_offset, double[] du, int _du_offset, double[] x, int _x_offset, int ldx, double beta, double[] 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

Dlagtm

public Dlagtm()
Method Detail

dlagtm

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