--- rpl/lapack/lapack/dspcon.f 2010/08/06 15:28:47 1.3
+++ rpl/lapack/lapack/dspcon.f 2023/08/07 08:39:06 1.19
@@ -1,12 +1,131 @@
+*> \brief \b DSPCON
+*
+* =========== DOCUMENTATION ===========
+*
+* Online html documentation available at
+* http://www.netlib.org/lapack/explore-html/
+*
+*> \htmlonly
+*> Download DSPCON + dependencies
+*>
+*> [TGZ]
+*>
+*> [ZIP]
+*>
+*> [TXT]
+*> \endhtmlonly
+*
+* Definition:
+* ===========
+*
+* SUBROUTINE DSPCON( UPLO, N, AP, IPIV, ANORM, RCOND, WORK, IWORK,
+* INFO )
+*
+* .. Scalar Arguments ..
+* CHARACTER UPLO
+* INTEGER INFO, N
+* DOUBLE PRECISION ANORM, RCOND
+* ..
+* .. Array Arguments ..
+* INTEGER IPIV( * ), IWORK( * )
+* DOUBLE PRECISION AP( * ), WORK( * )
+* ..
+*
+*
+*> \par Purpose:
+* =============
+*>
+*> \verbatim
+*>
+*> DSPCON estimates the reciprocal of the condition number (in the
+*> 1-norm) of a real symmetric packed matrix A using the factorization
+*> A = U*D*U**T or A = L*D*L**T computed by DSPTRF.
+*>
+*> An estimate is obtained for norm(inv(A)), and the reciprocal of the
+*> condition number is computed as RCOND = 1 / (ANORM * norm(inv(A))).
+*> \endverbatim
+*
+* Arguments:
+* ==========
+*
+*> \param[in] UPLO
+*> \verbatim
+*> UPLO is 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.
+*> \endverbatim
+*>
+*> \param[in] N
+*> \verbatim
+*> N is INTEGER
+*> The order of the matrix A. N >= 0.
+*> \endverbatim
+*>
+*> \param[in] AP
+*> \verbatim
+*> AP is DOUBLE PRECISION array, dimension (N*(N+1)/2)
+*> The block diagonal matrix D and the multipliers used to
+*> obtain the factor U or L as computed by DSPTRF, stored as a
+*> packed triangular matrix.
+*> \endverbatim
+*>
+*> \param[in] IPIV
+*> \verbatim
+*> IPIV is INTEGER array, dimension (N)
+*> Details of the interchanges and the block structure of D
+*> as determined by DSPTRF.
+*> \endverbatim
+*>
+*> \param[in] ANORM
+*> \verbatim
+*> ANORM is DOUBLE PRECISION
+*> The 1-norm of the original matrix A.
+*> \endverbatim
+*>
+*> \param[out] RCOND
+*> \verbatim
+*> RCOND is 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.
+*> \endverbatim
+*>
+*> \param[out] WORK
+*> \verbatim
+*> WORK is DOUBLE PRECISION array, dimension (2*N)
+*> \endverbatim
+*>
+*> \param[out] IWORK
+*> \verbatim
+*> IWORK is INTEGER array, dimension (N)
+*> \endverbatim
+*>
+*> \param[out] INFO
+*> \verbatim
+*> INFO is INTEGER
+*> = 0: successful exit
+*> < 0: if INFO = -i, the i-th argument had an illegal value
+*> \endverbatim
+*
+* Authors:
+* ========
+*
+*> \author Univ. of Tennessee
+*> \author Univ. of California Berkeley
+*> \author Univ. of Colorado Denver
+*> \author NAG Ltd.
+*
+*> \ingroup doubleOTHERcomputational
+*
+* =====================================================================
SUBROUTINE DSPCON( UPLO, N, AP, IPIV, ANORM, RCOND, WORK, IWORK,
$ INFO )
*
-* -- LAPACK routine (version 3.2) --
+* -- LAPACK computational routine --
* -- LAPACK is a software package provided by Univ. of Tennessee, --
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
-* November 2006
-*
-* Modified to call DLACN2 in place of DLACON, 5 Feb 03, SJH.
*
* .. Scalar Arguments ..
CHARACTER UPLO
@@ -18,53 +137,6 @@
DOUBLE PRECISION AP( * ), WORK( * )
* ..
*
-* Purpose
-* =======
-*
-* DSPCON estimates the reciprocal of the condition number (in the
-* 1-norm) of a real symmetric packed matrix A using the factorization
-* A = U*D*U**T or A = L*D*L**T computed by DSPTRF.
-*
-* 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.
-*
-* AP (input) DOUBLE PRECISION array, dimension (N*(N+1)/2)
-* The block diagonal matrix D and the multipliers used to
-* obtain the factor U or L as computed by DSPTRF, stored as a
-* packed triangular matrix.
-*
-* IPIV (input) INTEGER array, dimension (N)
-* Details of the interchanges and the block structure of D
-* as determined by DSPTRF.
-*
-* 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 ..
@@ -145,7 +217,7 @@
CALL DLACN2( N, WORK( N+1 ), WORK, IWORK, AINVNM, KASE, ISAVE )
IF( KASE.NE.0 ) THEN
*
-* Multiply by inv(L*D*L') or inv(U*D*U').
+* Multiply by inv(L*D*L**T) or inv(U*D*U**T).
*
CALL DSPTRS( UPLO, N, 1, AP, IPIV, WORK, N, INFO )
GO TO 30