Overview | Package | Class | Tree | Deprecated | Index | Help
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD

## org.netlib.lapack
Class Ssptri

    java.lang.Object
      org.netlib.lapack.Ssptri

    public class Ssptri

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
     *  =======
     *
     *  SSPTRI computes the inverse of a real symmetric indefinite matrix
     *  A in packed storage using the factorization A = U*D*U**T or
     *  A = L*D*L**T computed by SSPTRF.
     *
     *  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.
     *
     *  AP      (input/output) REAL array, dimension (N*(N+1)/2)
     *          On entry, the block diagonal matrix D and the multipliers
     *          used to obtain the factor U or L as computed by SSPTRF,
     *          stored as a packed triangular matrix.
     *
     *          On exit, if INFO = 0, the (symmetric) inverse of the original
     *          matrix, stored as a packed triangular matrix. The j-th column
     *          of inv(A) is stored in the array AP as follows:
     *          if UPLO = 'U', AP(i + (j-1)*j/2) = inv(A)(i,j) for 1<=i<=j;
     *          if UPLO = 'L',
     *             AP(i + (j-1)*(2n-j)/2) = inv(A)(i,j) for j<=i<=n.
     *
     *  IPIV    (input) INTEGER array, dimension (N)
     *          Details of the interchanges and the block structure of D
     *          as determined by SSPTRF.
     *
     *  WORK    (workspace) REAL 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
`Ssptri()`

Method Summary
`static void` | `ssptri(java.lang.String uplo, int n, float[] ap, int _ap_offset, int[] ipiv, int _ipiv_offset, float[] 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

### Ssptri

    public Ssptri()

Method Detail

### ssptri

    public static void ssptri(java.lang.String uplo,
                              int n,
                              float[] ap,
                              int _ap_offset,
                              int[] ipiv,
                              int _ipiv_offset,
                              float[] work,
                              int _work_offset,
                              intW info)

Overview | Package | Class | Tree | Deprecated | Index | Help
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD