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## org.netlib.lapack
Class SGTCON

    java.lang.Object
      org.netlib.lapack.SGTCON

    public class SGTCON

extends java.lang.Object

    SGTCON is a simplified interface to the JLAPACK routine sgtcon.
    This interface converts Java-style 2D row-major arrays into
    the 1D column-major linearized arrays expected by the lower
    level JLAPACK routines.  Using this interface also allows you
    to omit offset and leading dimension arguments.  However, because
    of these conversions, these routines will be slower than the low
    level ones.  Following is the description from the original Fortran
    source.  Contact seymour@cs.utk.edu with any questions.

     *     ..
     *
     *  Purpose
     *  =======
     *
     *  SGTCON estimates the reciprocal of the condition number of a real
     *  tridiagonal matrix A using the LU factorization as computed by
     *  SGTTRF.
     *
     *  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
     *  =========
     *
     *  NORM    (input) CHARACTER*1
     *          Specifies whether the 1-norm condition number or the
     *          infinity-norm condition number is required:
     *          = '1' or 'O':  1-norm;
     *          = 'I':         Infinity-norm.
     *
     *  N       (input) INTEGER
     *          The order of the matrix A.  N >= 0.
     *
     *  DL      (input) REAL array, dimension (N-1)
     *          The (n-1) multipliers that define the matrix L from the
     *          LU factorization of A as computed by SGTTRF.
     *
     *  D       (input) REAL array, dimension (N)
     *          The n diagonal elements of the upper triangular matrix U from
     *          the LU factorization of A.
     *
     *  DU      (input) REAL array, dimension (N-1)
     *          The (n-1) elements of the first superdiagonal of U.
     *
     *  DU2     (input) REAL array, dimension (N-2)
     *          The (n-2) elements of the second superdiagonal of U.
     *
     *  IPIV    (input) INTEGER array, dimension (N)
     *          The pivot indices; for 1 <= i <= n, row i of the matrix was
     *          interchanged with row IPIV(i).  IPIV(i) will always be either
     *          i or i+1; IPIV(i) = i indicates a row interchange was not
     *          required.
     *
     *  ANORM   (input) REAL
     *          If NORM = '1' or 'O', the 1-norm of the original matrix A.
     *          If NORM = 'I', the infinity-norm of the original matrix A.
     *
     *  RCOND   (output) REAL
     *          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) REAL 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
`SGTCON()`

Method Summary
`static void` | `SGTCON(java.lang.String norm, int n, float[] dl, float[] d, float[] du, float[] du2, int[] ipiv, float anorm, floatW rcond, float[] work, int[] iwork, intW info)`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### SGTCON

    public SGTCON()

Method Detail

### SGTCON

    public static void SGTCON(java.lang.String norm,
                              int n,
                              float[] dl,
                              float[] d,
                              float[] du,
                              float[] du2,
                              int[] ipiv,
                              float anorm,
                              floatW rcond,
                              float[] work,
                              int[] iwork,
                              intW info)

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