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-version 1.1.1.1, 2010/01/26 15:22:45
+version 1.12, 2012/12/14 12:30:27
  Line 1
+ *> \brief \b DPTTRF
+ *
+ *  =========== DOCUMENTATION ===========
+ *
+ * Online html documentation available at
+ *            http://www.netlib.org/lapack/explore-html/
+ *
+ *> \htmlonly
+ *> Download DPTTRF + dependencies
+ *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dpttrf.f">
+ *> [TGZ]</a>
+ *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dpttrf.f">
+ *> [ZIP]</a>
+ *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dpttrf.f">
+ *> [TXT]</a>
+ *> \endhtmlonly
+ *
+ *  Definition:
+ *  ===========
+ *
+ *       SUBROUTINE DPTTRF( N, D, E, INFO )
+ *
+ *       .. Scalar Arguments ..
+ *       INTEGER            INFO, N
+ *       ..
+ *       .. Array Arguments ..
+ *       DOUBLE PRECISION   D( * ), E( * )
+ *       ..
+ *
+ *
+ *> \par Purpose:
+ *  =============
+ *>
+ *> \verbatim
+ *>
+ *> DPTTRF computes the L*D*L**T factorization of a real symmetric
+ *> positive definite tridiagonal matrix A.  The factorization may also
+ *> be regarded as having the form A = U**T*D*U.
+ *> \endverbatim
+ *
+ *  Arguments:
+ *  ==========
+ *
+ *> \param[in] N
+ *> \verbatim
+ *>          N is INTEGER
+ *>          The order of the matrix A.  N >= 0.
+ *> \endverbatim
+ *>
+ *> \param[in,out] D
+ *> \verbatim
+ *>          D is DOUBLE PRECISION array, dimension (N)
+ *>          On entry, the n diagonal elements of the tridiagonal matrix
+ *>          A.  On exit, the n diagonal elements of the diagonal matrix
+ *>          D from the L*D*L**T factorization of A.
+ *> \endverbatim
+ *>
+ *> \param[in,out] E
+ *> \verbatim
+ *>          E is DOUBLE PRECISION array, dimension (N-1)
+ *>          On entry, the (n-1) subdiagonal elements of the tridiagonal
+ *>          matrix A.  On exit, the (n-1) subdiagonal elements of the
+ *>          unit bidiagonal factor L from the L*D*L**T factorization of A.
+ *>          E can also be regarded as the superdiagonal of the unit
+ *>          bidiagonal factor U from the U**T*D*U factorization of A.
+ *> \endverbatim
+ *>
+ *> \param[out] INFO
+ *> \verbatim
+ *>          INFO is INTEGER
+ *>          = 0: successful exit
+ *>          < 0: if INFO = -k, the k-th argument had an illegal value
+ *>          > 0: if INFO = k, the leading minor of order k is not
+ *>               positive definite; if k < N, the factorization could not
+ *>               be completed, while if k = N, the factorization was
+ *>               completed, but D(N) <= 0.
+ *> \endverbatim
+ *
+ *  Authors:
+ *  ========
+ *
+ *> \author Univ. of Tennessee
+ *> \author Univ. of California Berkeley
+ *> \author Univ. of Colorado Denver
+ *> \author NAG Ltd.
+ *
+ *> \date September 2012
+ *
+ *> \ingroup doublePTcomputational
+ *
+ *  =====================================================================
        SUBROUTINE DPTTRF( N, D, E, INFO )
  *
- *  -- LAPACK routine (version 3.2) --
+ *  -- LAPACK computational routine (version 3.4.2) --
  *  -- LAPACK is a software package provided by Univ. of Tennessee,    --
  *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
- *     November 2006
+ *     September 2012
  *
  *     .. Scalar Arguments ..
        INTEGER            INFO, N
- Line 12
+ Line 103
        DOUBLE PRECISION   D( * ), E( * )
  *     ..
  *
- *  Purpose
- *  =======
- *
- *  DPTTRF computes the L*D*L' factorization of a real symmetric
- *  positive definite tridiagonal matrix A.  The factorization may also
- *  be regarded as having the form A = U'*D*U.
- *
- *  Arguments
- *  =========
- *
- *  N       (input) INTEGER
- *          The order of the matrix A.  N >= 0.
- *
- *  D       (input/output) DOUBLE PRECISION array, dimension (N)
- *          On entry, the n diagonal elements of the tridiagonal matrix
- *          A.  On exit, the n diagonal elements of the diagonal matrix
- *          D from the L*D*L' factorization of A.
- *
- *  E       (input/output) DOUBLE PRECISION array, dimension (N-1)
- *          On entry, the (n-1) subdiagonal elements of the tridiagonal
- *          matrix A.  On exit, the (n-1) subdiagonal elements of the
- *          unit bidiagonal factor L from the L*D*L' factorization of A.
- *          E can also be regarded as the superdiagonal of the unit
- *          bidiagonal factor U from the U'*D*U factorization of A.
- *
- *  INFO    (output) INTEGER
- *          = 0: successful exit
- *          < 0: if INFO = -k, the k-th argument had an illegal value
- *          > 0: if INFO = k, the leading minor of order k is not
- *               positive definite; if k < N, the factorization could not
- *               be completed, while if k = N, the factorization was
- *               completed, but D(N) <= 0.
- *
  *  =====================================================================
  *
  *     .. Parameters ..
- Line 77
+ Line 135
        IF( N.EQ.0 )
       $   RETURN
  *
- *     Compute the L*D*L' (or U'*D*U) factorization of A.
+ *     Compute the L*D*L**T (or U**T*D*U) factorization of A.
  *
        I4 = MOD( N-1, 4 )
        DO 10 I = 1, I4

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