org.netlib.lapack
Class Sptsv

java.lang.Object
  org.netlib.lapack.Sptsv

public class Sptsv
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
 *  =======
 *
 *  SPTSV computes the solution to a real system of linear equations
 *  A*X = B, where A is an N-by-N symmetric positive definite tridiagonal
 *  matrix, and X and B are N-by-NRHS matrices.
 *
 *  A is factored as A = L*D*L**T, and the factored form of A is then
 *  used to solve the system of equations.
 *
 *  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.
 *
 *  D       (input/output) REAL array, dimension (N)
 *          On entry, the n diagonal elements of the tridiagonal matrix
 *          A.  On exit, the n diagonal elements of the diagonal matrix
 *          D from the factorization A = L*D*L**T.
 *
 *  E       (input/output) REAL array, dimension (N-1)
 *          On entry, the (n-1) subdiagonal elements of the tridiagonal
 *          matrix A.  On exit, the (n-1) subdiagonal elements of the
 *          unit bidiagonal factor L from the L*D*L**T factorization of
 *          A.  (E can also be regarded as the superdiagonal of the unit

 *          bidiagonal factor U from the U**T*D*U factorization of A.)
 *
 *  B       (input/output) REAL 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, the leading minor of order i is not
 *                positive definite, and the solution has not been
 *                computed.  The factorization has not been completed
 *                unless i = N.
 *
 *  =====================================================================
 *
 *     .. External Subroutines ..

Constructor Summary

Sptsv()

Method Summary

static void

sptsv(int n, int nrhs, float[] d, int _d_offset, float[] e, int _e_offset, float[] b, int _b_offset, int ldb, intW info)

Methods inherited from class java.lang.Object

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

Constructor Detail

Sptsv

public Sptsv()

Method Detail

sptsv

public static void sptsv(int n,
                         int nrhs,
                         float[] d,
                         int _d_offset,
                         float[] e,
                         int _e_offset,
                         float[] b,
                         int _b_offset,
                         int ldb,
                         intW info)