rpl/lapack/lapack/dtgexc.f - diff

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Diff for /rpl/lapack/lapack/dtgexc.f between versions 1.8 and 1.9

version 1.8, 2010/12/21 13:53:40	version 1.9, 2011/07/22 07:38:12
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SUBROUTINE DTGEXC( WANTQ, WANTZ, N, A, LDA, B, LDB, Q, LDQ, Z,	SUBROUTINE DTGEXC( WANTQ, WANTZ, N, A, LDA, B, LDB, Q, LDQ, Z,
$ LDZ, IFST, ILST, WORK, LWORK, INFO )	$ LDZ, IFST, ILST, WORK, LWORK, INFO )
*	*
* -- LAPACK routine (version 3.2.2) --	* -- LAPACK routine (version 3.3.1) --
* -- LAPACK is a software package provided by Univ. of Tennessee, --	* -- LAPACK is a software package provided by Univ. of Tennessee, --
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--	* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
* June 2010	* -- April 2011 --
*	*
* .. Scalar Arguments ..	* .. Scalar Arguments ..
LOGICAL WANTQ, WANTZ	LOGICAL WANTQ, WANTZ
Line 21	Line 21
* DTGEXC reorders the generalized real Schur decomposition of a real	* DTGEXC reorders the generalized real Schur decomposition of a real
* matrix pair (A,B) using an orthogonal equivalence transformation	* matrix pair (A,B) using an orthogonal equivalence transformation
*	*
* (A, B) = Q * (A, B) * Z',	* (A, B) = Q * (A, B) * Z**T,
*	*
* so that the diagonal block of (A, B) with row index IFST is moved	* so that the diagonal block of (A, B) with row index IFST is moved
* to row ILST.	* to row ILST.
Line 33	Line 33
* Optionally, the matrices Q and Z of generalized Schur vectors are	* Optionally, the matrices Q and Z of generalized Schur vectors are
* updated.	* updated.
*	*
* Q(in) * A(in) * Z(in)' = Q(out) * A(out) * Z(out)'	* Q(in) * A(in) * Z(in)*T = Q(out) A(out) * Z(out)**T
* Q(in) * B(in) * Z(in)' = Q(out) * B(out) * Z(out)'	* Q(in) * B(in) * Z(in)*T = Q(out) B(out) * Z(out)**T
*	*
*	*
* Arguments	* Arguments

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	Added in v.1.9