org.netlib.lapack
Class Dsytri

java.lang.Object
  org.netlib.lapack.Dsytri

public class Dsytri
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
 *  =======
 *
 *  DSYTRI computes the inverse of a real symmetric indefinite matrix
 *  A using the factorization A = U*D*U**T or A = L*D*L**T computed by
 *  DSYTRF.
 *
 *  Arguments
 *  =========
 *
 *  UPLO    (input) CHARACTER*1
 *          Specifies whether the details of the factorization are stored
 *          as an upper or lower triangular matrix.
 *          = 'U':  Upper triangular, form is A = U*D*U**T;
 *          = 'L':  Lower triangular, form is A = L*D*L**T.
 *
 *  N       (input) INTEGER
 *          The order of the matrix A.  N >= 0.
 *
 *  A       (input/output) DOUBLE PRECISION array, dimension (LDA,N)
 *          On entry, the block diagonal matrix D and the multipliers
 *          used to obtain the factor U or L as computed by DSYTRF.
 *
 *          On exit, if INFO = 0, the (symmetric) inverse of the original
 *          matrix.  If UPLO = 'U', the upper triangular part of the
 *          inverse is formed and the part of A below the diagonal is not
 *          referenced; if UPLO = 'L' the lower triangular part of the
 *          inverse is formed and the part of A above the diagonal is
 *          not referenced.
 *
 *  LDA     (input) INTEGER
 *          The leading dimension of the array A.  LDA >= max(1,N).
 *
 *  IPIV    (input) INTEGER array, dimension (N)
 *          Details of the interchanges and the block structure of D
 *          as determined by DSYTRF.
 *
 *  WORK    (workspace) DOUBLE PRECISION array, dimension (N)
 *
 *  INFO    (output) INTEGER
 *          = 0: successful exit
 *          < 0: if INFO = -i, the i-th argument had an illegal value
 *          > 0: if INFO = i, D(i,i) = 0; the matrix is singular and its

 *               inverse could not be computed.
 *
 *  =====================================================================
 *
 *     .. Parameters ..

Constructor Summary

Dsytri()

Method Summary

static void

dsytri(java.lang.String uplo, int n, double[] a, int _a_offset, int lda, int[] ipiv, int _ipiv_offset, double[] work, int _work_offset, intW info)

Methods inherited from class java.lang.Object

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

Constructor Detail

Dsytri

public Dsytri()

Method Detail

dsytri

public static void dsytri(java.lang.String uplo,
                          int n,
                          double[] a,
                          int _a_offset,
                          int lda,
                          int[] ipiv,
                          int _ipiv_offset,
                          double[] work,
                          int _work_offset,
                          intW info)