org.netlib.lapack
Class Dsycon

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

public class Dsycon
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 * ======= * * DSYCON estimates the reciprocal of the condition number (in the * 1-norm) of a real symmetric matrix A using the factorization * A = U*D*U**T or A = L*D*L**T computed by DSYTRF. * * An estimate is obtained for norm(inv(A)), and the reciprocal of the * condition number is computed as RCOND = 1 / (ANORM * norm(inv(A))). * * 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) DOUBLE PRECISION array, dimension (LDA,N) * The block diagonal matrix D and the multipliers used to * obtain the factor U or L as computed by DSYTRF. * * 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. * * ANORM (input) DOUBLE PRECISION * The 1-norm of the original matrix A. * * RCOND (output) DOUBLE PRECISION * The reciprocal of the condition number of the matrix A, * computed as RCOND = 1/(ANORM * AINVNM), where AINVNM is an * estimate of the 1-norm of inv(A) computed in this routine. * * WORK (workspace) DOUBLE PRECISION array, dimension (2*N) * * IWORK (workspace) INTEGER array, dimension (N) * * INFO (output) INTEGER * = 0: successful exit * < 0: if INFO = -i, the i-th argument had an illegal value * * ===================================================================== * * .. Parameters ..


Constructor Summary
Dsycon()
           
 
Method Summary
static void dsycon(java.lang.String uplo, int n, double[] a, int _a_offset, int lda, int[] ipiv, int _ipiv_offset, double anorm, doubleW rcond, double[] work, int _work_offset, int[] iwork, int _iwork_offset, intW info)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

Dsycon

public Dsycon()
Method Detail

dsycon

public static void dsycon(java.lang.String uplo,
                          int n,
                          double[] a,
                          int _a_offset,
                          int lda,
                          int[] ipiv,
                          int _ipiv_offset,
                          double anorm,
                          doubleW rcond,
                          double[] work,
                          int _work_offset,
                          int[] iwork,
                          int _iwork_offset,
                          intW info)