org.netlib.lapack
Class Spttrs

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

public class Spttrs
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 * ======= * * 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, 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

Spttrs

public Spttrs()
Method Detail

spttrs

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