org.netlib.lapack
Class Dgtts2

java.lang.Object
  org.netlib.lapack.Dgtts2

public class Dgtts2
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
 *  =======
 *
 *  DGTTS2 solves one of the systems of equations
 *     A*X = B  or  A'*X = B,
 *  with a tridiagonal matrix A using the LU factorization computed
 *  by DGTTRF.
 *
 *  Arguments
 *  =========
 *
 *  ITRANS  (input) INTEGER
 *          Specifies the form of the system of equations.
 *          = 0:  A * X = B  (No transpose)
 *          = 1:  A'* X = B  (Transpose)
 *          = 2:  A'* X = B  (Conjugate transpose = Transpose)
 *
 *  N       (input) INTEGER
 *          The order of the matrix A.
 *
 *  NRHS    (input) INTEGER
 *          The number of right hand sides, i.e., the number of columns
 *          of the matrix B.  NRHS >= 0.
 *
 *  DL      (input) DOUBLE PRECISION array, dimension (N-1)
 *          The (n-1) multipliers that define the matrix L from the
 *          LU factorization of A.
 *
 *  D       (input) DOUBLE PRECISION array, dimension (N)
 *          The n diagonal elements of the upper triangular matrix U from
 *          the LU factorization of A.
 *
 *  DU      (input) DOUBLE PRECISION array, dimension (N-1)
 *          The (n-1) elements of the first super-diagonal of U.
 *
 *  DU2     (input) DOUBLE PRECISION array, dimension (N-2)
 *          The (n-2) elements of the second super-diagonal of U.
 *
 *  IPIV    (input) INTEGER array, dimension (N)
 *          The pivot indices; for 1 <= i <= n, row i of the matrix was
 *          interchanged with row IPIV(i).  IPIV(i) will always be either
 *          i or i+1; IPIV(i) = i indicates a row interchange was not
 *          required.
 *
 *  B       (input/output) DOUBLE PRECISION array, dimension (LDB,NRHS)
 *          On entry, the matrix of right hand side vectors B.
 *          On exit, B is overwritten by the solution vectors X.
 *
 *  LDB     (input) INTEGER
 *          The leading dimension of the array B.  LDB >= max(1,N).
 *
 *  =====================================================================
 *
 *     .. Local Scalars ..

Constructor Summary

Dgtts2()

Method Summary

static void

dgtts2(int itrans, int n, int nrhs, double[] dl, int _dl_offset, double[] d, int _d_offset, double[] du, int _du_offset, double[] du2, int _du2_offset, int[] ipiv, int _ipiv_offset, 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

Dgtts2

public Dgtts2()

Method Detail

dgtts2

public static void dgtts2(int itrans,
                          int n,
                          int nrhs,
                          double[] dl,
                          int _dl_offset,
                          double[] d,
                          int _d_offset,
                          double[] du,
                          int _du_offset,
                          double[] du2,
                          int _du2_offset,
                          int[] ipiv,
                          int _ipiv_offset,
                          double[] b,
                          int _b_offset,
                          int ldb)