org.netlib.lapack
Class SPTTRS

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

public class SPTTRS
extends java.lang.Object

SPTTRS is a simplified interface to the JLAPACK routine spttrs.
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 * ======= * * SPTTRS solves a tridiagonal system of the form * A * X = B * using the L*D*L' factorization of A computed by SPTTRF. D is a * diagonal matrix specified in the vector D, L is a unit bidiagonal * matrix whose subdiagonal is specified in the vector E, and X and B * are N by NRHS matrices. * * Arguments * ========= * * N (input) INTEGER * The order of the tridiagonal 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) REAL array, dimension (N) * The n diagonal elements of the diagonal matrix D from the * L*D*L' factorization of A. * * E (input) REAL array, dimension (N-1) * The (n-1) subdiagonal elements of the unit bidiagonal factor * L from the L*D*L' factorization of A. E can also be regarded * as the superdiagonal of the unit bidiagonal factor U from the * factorization A = U'*D*U. * * B (input/output) REAL array, dimension (LDB,NRHS) * On entry, the right hand side vectors B for the system of * linear equations. * On exit, the solution vectors, X. * * LDB (input) INTEGER * The leading dimension of the array B. LDB >= max(1,N). * * INFO (output) INTEGER * = 0: successful exit * < 0: if INFO = -k, the k-th argument had an illegal value * * ===================================================================== * * .. Local Scalars ..


Constructor Summary
SPTTRS()
           
 
Method Summary
static void SPTTRS(int n, int nrhs, float[] d, float[] e, float[][] b, intW info)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

SPTTRS

public SPTTRS()
Method Detail

SPTTRS

public static void SPTTRS(int n,
                          int nrhs,
                          float[] d,
                          float[] e,
                          float[][] b,
                          intW info)