Overview | Package | Class | Tree | Deprecated | Index | Help
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD

## org.netlib.lapack
Class SLAGTM

    java.lang.Object
      org.netlib.lapack.SLAGTM

    public class SLAGTM

extends java.lang.Object

    SLAGTM is a simplified interface to the JLAPACK routine slagtm.
    This interface converts Java-style 2D row-major arrays into
    the 1D column-major linearized arrays expected by the lower
    level JLAPACK routines.  Using this interface also allows you
    to omit offset and leading dimension arguments.  However, because
    of these conversions, these routines will be slower than the low
    level ones.  Following is the description from the original Fortran
    source.  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*1
     *          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, float[] d, float[] du, float[][] x, float beta, float[][] b)`

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,
                              float[] d,
                              float[] du,
                              float[][] x,
                              float beta,
                              float[][] b)

Overview | Package | Class | Tree | Deprecated | Index | Help
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD