version 1.11, 2012/07/31 11:06:40
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version 1.19, 2023/08/07 08:39:43
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* |
* |
* =========== DOCUMENTATION =========== |
* =========== DOCUMENTATION =========== |
* |
* |
* Online html documentation available at |
* Online html documentation available at |
* http://www.netlib.org/lapack/explore-html/ |
* http://www.netlib.org/lapack/explore-html/ |
* |
* |
*> \htmlonly |
*> \htmlonly |
*> Download ZUNGBR + dependencies |
*> Download ZUNGBR + dependencies |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/zungbr.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/zungbr.f"> |
*> [TGZ]</a> |
*> [TGZ]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/zungbr.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/zungbr.f"> |
*> [ZIP]</a> |
*> [ZIP]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/zungbr.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/zungbr.f"> |
*> [TXT]</a> |
*> [TXT]</a> |
*> \endhtmlonly |
*> \endhtmlonly |
* |
* |
* Definition: |
* Definition: |
* =========== |
* =========== |
* |
* |
* SUBROUTINE ZUNGBR( VECT, M, N, K, A, LDA, TAU, WORK, LWORK, INFO ) |
* SUBROUTINE ZUNGBR( VECT, M, N, K, A, LDA, TAU, WORK, LWORK, INFO ) |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
* CHARACTER VECT |
* CHARACTER VECT |
* INTEGER INFO, K, LDA, LWORK, M, N |
* INTEGER INFO, K, LDA, LWORK, M, N |
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* .. Array Arguments .. |
* .. Array Arguments .. |
* COMPLEX*16 A( LDA, * ), TAU( * ), WORK( * ) |
* COMPLEX*16 A( LDA, * ), TAU( * ), WORK( * ) |
* .. |
* .. |
* |
* |
* |
* |
*> \par Purpose: |
*> \par Purpose: |
* ============= |
* ============= |
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* Authors: |
* Authors: |
* ======== |
* ======== |
* |
* |
*> \author Univ. of Tennessee |
*> \author Univ. of Tennessee |
*> \author Univ. of California Berkeley |
*> \author Univ. of California Berkeley |
*> \author Univ. of Colorado Denver |
*> \author Univ. of Colorado Denver |
*> \author NAG Ltd. |
*> \author NAG Ltd. |
* |
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*> \date April 2012 |
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* |
* |
*> \ingroup complex16GBcomputational |
*> \ingroup complex16GBcomputational |
* |
* |
* ===================================================================== |
* ===================================================================== |
SUBROUTINE ZUNGBR( VECT, M, N, K, A, LDA, TAU, WORK, LWORK, INFO ) |
SUBROUTINE ZUNGBR( VECT, M, N, K, A, LDA, TAU, WORK, LWORK, INFO ) |
* |
* |
* -- LAPACK computational routine (version 3.4.1) -- |
* -- LAPACK computational routine -- |
* -- 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..-- |
* April 2012 |
|
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
CHARACTER VECT |
CHARACTER VECT |
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* .. |
* .. |
* .. External Functions .. |
* .. External Functions .. |
LOGICAL LSAME |
LOGICAL LSAME |
INTEGER ILAENV |
EXTERNAL LSAME |
EXTERNAL LSAME, ILAENV |
|
* .. |
* .. |
* .. External Subroutines .. |
* .. External Subroutines .. |
EXTERNAL XERBLA, ZUNGLQ, ZUNGQR |
EXTERNAL XERBLA, ZUNGLQ, ZUNGQR |
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CALL ZUNGQR( M, N, K, A, LDA, TAU, WORK, -1, IINFO ) |
CALL ZUNGQR( M, N, K, A, LDA, TAU, WORK, -1, IINFO ) |
ELSE |
ELSE |
IF( M.GT.1 ) THEN |
IF( M.GT.1 ) THEN |
CALL ZUNGQR( M-1, M-1, M-1, A( 2, 2 ), LDA, TAU, WORK, |
CALL ZUNGQR( M-1, M-1, M-1, A, LDA, TAU, WORK, -1, |
$ -1, IINFO ) |
$ IINFO ) |
END IF |
END IF |
END IF |
END IF |
ELSE |
ELSE |
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CALL ZUNGLQ( M, N, K, A, LDA, TAU, WORK, -1, IINFO ) |
CALL ZUNGLQ( M, N, K, A, LDA, TAU, WORK, -1, IINFO ) |
ELSE |
ELSE |
IF( N.GT.1 ) THEN |
IF( N.GT.1 ) THEN |
CALL ZUNGLQ( N-1, N-1, N-1, A( 2, 2 ), LDA, TAU, WORK, |
CALL ZUNGLQ( N-1, N-1, N-1, A, LDA, TAU, WORK, -1, |
$ -1, IINFO ) |
$ IINFO ) |
END IF |
END IF |
END IF |
END IF |
END IF |
END IF |
LWKOPT = WORK( 1 ) |
LWKOPT = INT( DBLE( WORK( 1 ) ) ) |
LWKOPT = MAX (LWKOPT, MN) |
LWKOPT = MAX (LWKOPT, MN) |
END IF |
END IF |
* |
* |