org.netlib.lapack
Class Ssptri

java.lang.Object
  extended by 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)