--- rpl/lapack/lapack/dtrtrs.f 2010/01/26 15:22:45 1.1.1.1
+++ rpl/lapack/lapack/dtrtrs.f 2023/08/07 08:39:14 1.18
@@ -1,10 +1,146 @@
+*> \brief \b DTRTRS
+*
+* =========== DOCUMENTATION ===========
+*
+* Online html documentation available at
+* http://www.netlib.org/lapack/explore-html/
+*
+*> \htmlonly
+*> Download DTRTRS + dependencies
+*>
+*> [TGZ]
+*>
+*> [ZIP]
+*>
+*> [TXT]
+*> \endhtmlonly
+*
+* Definition:
+* ===========
+*
+* SUBROUTINE DTRTRS( UPLO, TRANS, DIAG, N, NRHS, A, LDA, B, LDB,
+* INFO )
+*
+* .. Scalar Arguments ..
+* CHARACTER DIAG, TRANS, UPLO
+* INTEGER INFO, LDA, LDB, N, NRHS
+* ..
+* .. Array Arguments ..
+* DOUBLE PRECISION A( LDA, * ), B( LDB, * )
+* ..
+*
+*
+*> \par Purpose:
+* =============
+*>
+*> \verbatim
+*>
+*> DTRTRS solves a triangular system of the form
+*>
+*> A * X = B or A**T * X = B,
+*>
+*> where A is a triangular matrix of order N, and B is an N-by-NRHS
+*> matrix. A check is made to verify that A is nonsingular.
+*> \endverbatim
+*
+* Arguments:
+* ==========
+*
+*> \param[in] UPLO
+*> \verbatim
+*> UPLO is CHARACTER*1
+*> = 'U': A is upper triangular;
+*> = 'L': A is lower triangular.
+*> \endverbatim
+*>
+*> \param[in] TRANS
+*> \verbatim
+*> TRANS is CHARACTER*1
+*> Specifies the form of the system of equations:
+*> = 'N': A * X = B (No transpose)
+*> = 'T': A**T * X = B (Transpose)
+*> = 'C': A**H * X = B (Conjugate transpose = Transpose)
+*> \endverbatim
+*>
+*> \param[in] DIAG
+*> \verbatim
+*> DIAG is CHARACTER*1
+*> = 'N': A is non-unit triangular;
+*> = 'U': A is unit triangular.
+*> \endverbatim
+*>
+*> \param[in] N
+*> \verbatim
+*> N is INTEGER
+*> The order of the matrix A. N >= 0.
+*> \endverbatim
+*>
+*> \param[in] NRHS
+*> \verbatim
+*> NRHS is INTEGER
+*> The number of right hand sides, i.e., the number of columns
+*> of the matrix B. NRHS >= 0.
+*> \endverbatim
+*>
+*> \param[in] A
+*> \verbatim
+*> A is DOUBLE PRECISION array, dimension (LDA,N)
+*> The triangular matrix A. If UPLO = 'U', the leading N-by-N
+*> upper triangular part of the array A contains the upper
+*> triangular matrix, and the strictly lower triangular part of
+*> A is not referenced. If UPLO = 'L', the leading N-by-N lower
+*> triangular part of the array A contains the lower triangular
+*> matrix, and the strictly upper triangular part of A is not
+*> referenced. If DIAG = 'U', the diagonal elements of A are
+*> also not referenced and are assumed to be 1.
+*> \endverbatim
+*>
+*> \param[in] LDA
+*> \verbatim
+*> LDA is INTEGER
+*> The leading dimension of the array A. LDA >= max(1,N).
+*> \endverbatim
+*>
+*> \param[in,out] B
+*> \verbatim
+*> B is DOUBLE PRECISION array, dimension (LDB,NRHS)
+*> On entry, the right hand side matrix B.
+*> On exit, if INFO = 0, the solution matrix X.
+*> \endverbatim
+*>
+*> \param[in] LDB
+*> \verbatim
+*> LDB is INTEGER
+*> The leading dimension of the array B. LDB >= max(1,N).
+*> \endverbatim
+*>
+*> \param[out] INFO
+*> \verbatim
+*> INFO is INTEGER
+*> = 0: successful exit
+*> < 0: if INFO = -i, the i-th argument had an illegal value
+*> > 0: if INFO = i, the i-th diagonal element of A is zero,
+*> indicating that the matrix is singular and the solutions
+*> X have not been computed.
+*> \endverbatim
+*
+* Authors:
+* ========
+*
+*> \author Univ. of Tennessee
+*> \author Univ. of California Berkeley
+*> \author Univ. of Colorado Denver
+*> \author NAG Ltd.
+*
+*> \ingroup doubleOTHERcomputational
+*
+* =====================================================================
SUBROUTINE DTRTRS( UPLO, TRANS, DIAG, N, NRHS, A, LDA, B, LDB,
$ 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
*
* .. Scalar Arguments ..
CHARACTER DIAG, TRANS, UPLO
@@ -14,67 +150,6 @@
DOUBLE PRECISION A( LDA, * ), B( LDB, * )
* ..
*
-* Purpose
-* =======
-*
-* DTRTRS solves a triangular system of the form
-*
-* A * X = B or A**T * X = B,
-*
-* where A is a triangular matrix of order N, and B is an N-by-NRHS
-* matrix. A check is made to verify that A is nonsingular.
-*
-* Arguments
-* =========
-*
-* UPLO (input) CHARACTER*1
-* = 'U': A is upper triangular;
-* = 'L': A is lower triangular.
-*
-* TRANS (input) CHARACTER*1
-* Specifies the form of the system of equations:
-* = 'N': A * X = B (No transpose)
-* = 'T': A**T * X = B (Transpose)
-* = 'C': A**H * X = B (Conjugate transpose = Transpose)
-*
-* DIAG (input) CHARACTER*1
-* = 'N': A is non-unit triangular;
-* = 'U': A is unit triangular.
-*
-* N (input) INTEGER
-* The order of the matrix A. N >= 0.
-*
-* NRHS (input) INTEGER
-* The number of right hand sides, i.e., the number of columns
-* of the matrix B. NRHS >= 0.
-*
-* A (input) DOUBLE PRECISION array, dimension (LDA,N)
-* The triangular matrix A. If UPLO = 'U', the leading N-by-N
-* upper triangular part of the array A contains the upper
-* triangular matrix, and the strictly lower triangular part of
-* A is not referenced. If UPLO = 'L', the leading N-by-N lower
-* triangular part of the array A contains the lower triangular
-* matrix, and the strictly upper triangular part of A is not
-* referenced. If DIAG = 'U', the diagonal elements of A are
-* also not referenced and are assumed to be 1.
-*
-* LDA (input) INTEGER
-* The leading dimension of the array A. LDA >= max(1,N).
-*
-* B (input/output) DOUBLE PRECISION array, dimension (LDB,NRHS)
-* On entry, the right hand side matrix B.
-* On exit, if INFO = 0, the solution matrix X.
-*
-* LDB (input) INTEGER
-* The leading dimension of the array B. LDB >= max(1,N).
-*
-* INFO (output) INTEGER
-* = 0: successful exit
-* < 0: if INFO = -i, the i-th argument had an illegal value
-* > 0: if INFO = i, the i-th diagonal element of A is zero,
-* indicating that the matrix is singular and the solutions
-* X have not been computed.
-*
* =====================================================================
*
* .. Parameters ..
@@ -136,7 +211,7 @@
END IF
INFO = 0
*
-* Solve A * x = b or A' * x = b.
+* Solve A * x = b or A**T * x = b.
*
CALL DTRSM( 'Left', UPLO, TRANS, DIAG, N, NRHS, ONE, A, LDA, B,
$ LDB )