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Class org.netlib.lapack.Dgtsv

java.lang.Object
   |
   +----org.netlib.lapack.Dgtsv

public class Dgtsv

extends 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
 *  =======
 *
 *  DGTSV  solves the equation
 *
 *     A*X = B,
 *
 *  where A is an N-by-N tridiagonal matrix, by Gaussian elimination with
 *  partial pivoting.
 *
 *  Note that the equation  A'*X = B  may be solved by interchanging the
 *  order of the arguments DU and DL.
 *
 *  Arguments
 *  =========
 *
 *  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 matrix B.  NRHS >= 0.
 *
 *  DL      (input/output) DOUBLE PRECISION array, dimension (N-1)
 *          On entry, DL must contain the (n-1) subdiagonal elements of
 *          A.
 *          On exit, DL is overwritten by the (n-2) elements of the
 *          second superdiagonal of the upper triangular matrix U from
 *          the LU factorization of A, in DL(1), ..., DL(n-2).
 *
 *  D       (input/output) DOUBLE PRECISION array, dimension (N)
 *          On entry, D must contain the diagonal elements of A.
 *          On exit, D is overwritten by the n diagonal elements of U.
 *
 *  DU      (input/output) DOUBLE PRECISION array, dimension (N-1)
 *          On entry, DU must contain the (n-1) superdiagonal elements
 *          of A.
 *          On exit, DU is overwritten by the (n-1) elements of the first
 *          superdiagonal of U.
 *
 *  B       (input/output) DOUBLE PRECISION array, dimension (LDB,NRHS)
 *          On entry, the N-by-NRHS right hand side matrix B.
 *          On exit, if INFO = 0, the N-by-NRHS solution matrix X.
 *
 *  LDB     (input) INTEGER
 *          The leading dimension of the array B.  LDB >= max(1,N).
 *
 *  INFO    (output) INTEGER
 *          = 0:  successful exit
 *          < 0:  if INFO = -i, the i-th argument had an illegal value
 *          > 0:  if INFO = i, U(i,i) is exactly zero, and the solution
 *                has not been computed.  The factorization has not been
 *                completed unless i = N.
 *
 *  =====================================================================
 *
 *     .. Parameters ..

Dgtsv()

dgtsv(int, int, double[], int, double[], int, double[], int, double[], int, int, intW)

 public Dgtsv()

 public static void dgtsv(int n,
                          int nrhs,
                          double dl[],
                          int _dl_offset,
                          double d[],
                          int _d_offset,
                          double du[],
                          int _du_offset,
                          double b[],
                          int _b_offset,
                          int ldb,
                          intW info)

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