version 1.7, 2010/12/21 13:53:58
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version 1.8, 2011/07/22 07:38:22
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SUBROUTINE ZUNGLQ( M, N, K, A, LDA, TAU, WORK, LWORK, INFO ) |
SUBROUTINE ZUNGLQ( M, N, K, A, LDA, TAU, WORK, LWORK, INFO ) |
* |
* |
* -- LAPACK routine (version 3.2) -- |
* -- 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..-- |
* November 2006 |
* -- April 2011 -- |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
INTEGER INFO, K, LDA, LWORK, M, N |
INTEGER INFO, K, LDA, LWORK, M, N |
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* which is defined as the first M rows of a product of K elementary |
* which is defined as the first M rows of a product of K elementary |
* reflectors of order N |
* reflectors of order N |
* |
* |
* Q = H(k)' . . . H(2)' H(1)' |
* Q = H(k)**H . . . H(2)**H H(1)**H |
* |
* |
* as returned by ZGELQF. |
* as returned by ZGELQF. |
* |
* |
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CALL ZLARFT( 'Forward', 'Rowwise', N-I+1, IB, A( I, I ), |
CALL ZLARFT( 'Forward', 'Rowwise', N-I+1, IB, A( I, I ), |
$ LDA, TAU( I ), WORK, LDWORK ) |
$ LDA, TAU( I ), WORK, LDWORK ) |
* |
* |
* Apply H' to A(i+ib:m,i:n) from the right |
* Apply H**H to A(i+ib:m,i:n) from the right |
* |
* |
CALL ZLARFB( 'Right', 'Conjugate transpose', 'Forward', |
CALL ZLARFB( 'Right', 'Conjugate transpose', 'Forward', |
$ 'Rowwise', M-I-IB+1, N-I+1, IB, A( I, I ), |
$ 'Rowwise', M-I-IB+1, N-I+1, IB, A( I, I ), |
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$ WORK( IB+1 ), LDWORK ) |
$ WORK( IB+1 ), LDWORK ) |
END IF |
END IF |
* |
* |
* Apply H' to columns i:n of current block |
* Apply H**H to columns i:n of current block |
* |
* |
CALL ZUNGL2( IB, N-I+1, IB, A( I, I ), LDA, TAU( I ), WORK, |
CALL ZUNGL2( IB, N-I+1, IB, A( I, I ), LDA, TAU( I ), WORK, |
$ IINFO ) |
$ IINFO ) |