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Diff for /rpl/lapack/lapack/dtgex2.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 DTGEX2( WANTQ, WANTZ, N, A, LDA, B, LDB, Q, LDQ, Z,        SUBROUTINE DTGEX2( WANTQ, WANTZ, N, A, LDA, B, LDB, Q, LDQ, Z,
      $                   LDZ, J1, N1, N2, WORK, LWORK, INFO )       $                   LDZ, J1, N1, N2, WORK, LWORK, INFO )
 *  *
 *  -- LAPACK auxiliary routine (version 3.2.2) --  *  -- LAPACK auxiliary 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
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 *  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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          IF( WANDS ) THEN           IF( WANDS ) THEN
 *  *
 *           Strong stability test:  *           Strong stability test:
 *             F-norm((A-QL'*S*QR, B-QL'*T*QR)) <= O(EPS*F-norm((A,B)))  *             F-norm((A-QL**T*S*QR, B-QL**T*T*QR)) <= O(EPS*F-norm((A,B)))
 *  *
             CALL DLACPY( 'Full', M, M, A( J1, J1 ), LDA, WORK( M*M+1 ),              CALL DLACPY( 'Full', M, M, A( J1, J1 ), LDA, WORK( M*M+1 ),
      $                   M )       $                   M )
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 *  *
 *        Compute orthogonal matrix QL:  *        Compute orthogonal matrix QL:
 *  *
 *                    QL' * LI = [ TL ]  *                    QL**T * LI = [ TL ]
 *                               [ 0  ]  *                                 [ 0  ]
 *        where  *        where
 *                    LI =  [      -L              ]  *                    LI =  [      -L              ]
 *                          [ SCALE * identity(N2) ]  *                          [ SCALE * identity(N2) ]
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 *  *
 *        Compute orthogonal matrix RQ:  *        Compute orthogonal matrix RQ:
 *  *
 *                    IR * RQ' =   [ 0  TR],  *                    IR * RQ**T =   [ 0  TR],
 *  *
 *         where IR = [ SCALE * identity(N1), R ]  *         where IR = [ SCALE * identity(N1), R ]
 *  *
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          IF( WANDS ) THEN           IF( WANDS ) THEN
 *  *
 *           Strong stability test:  *           Strong stability test:
 *              F-norm((A-QL*S*QR', B-QL*T*QR')) <= O(EPS*F-norm((A,B)))  *              F-norm((A-QL*S*QR**T, B-QL*T*QR**T)) <= O(EPS*F-norm((A,B)))
 *  *
             CALL DLACPY( 'Full', M, M, A( J1, J1 ), LDA, WORK( M*M+1 ),              CALL DLACPY( 'Full', M, M, A( J1, J1 ), LDA, WORK( M*M+1 ),
      $                   M )       $                   M )
Removed from v.1.8  
changed lines
  Added in v.1.9

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