version 1.12, 2012/08/22 09:48:18
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version 1.17, 2016/08/27 15:34:29
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*> \brief \b DLAQP2 |
*> \brief \b DLAQP2 computes a QR factorization with column pivoting of the matrix block. |
* |
* |
* =========== DOCUMENTATION =========== |
* =========== DOCUMENTATION =========== |
* |
* |
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*> \author Univ. of Colorado Denver |
*> \author Univ. of Colorado Denver |
*> \author NAG Ltd. |
*> \author NAG Ltd. |
* |
* |
*> \date November 2011 |
*> \date November 2013 |
* |
* |
*> \ingroup doubleOTHERauxiliary |
*> \ingroup doubleOTHERauxiliary |
* |
* |
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SUBROUTINE DLAQP2( M, N, OFFSET, A, LDA, JPVT, TAU, VN1, VN2, |
SUBROUTINE DLAQP2( M, N, OFFSET, A, LDA, JPVT, TAU, VN1, VN2, |
$ WORK ) |
$ WORK ) |
* |
* |
* -- LAPACK auxiliary routine (version 3.4.0) -- |
* -- LAPACK auxiliary routine (version 3.5.0) -- |
* -- 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 2011 |
* November 2013 |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
INTEGER LDA, M, N, OFFSET |
INTEGER LDA, M, N, OFFSET |
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CALL DLARFG( 1, A( M, I ), A( M, I ), 1, TAU( I ) ) |
CALL DLARFG( 1, A( M, I ), A( M, I ), 1, TAU( I ) ) |
END IF |
END IF |
* |
* |
IF( I.LE.N ) THEN |
IF( I.LT.N ) THEN |
* |
* |
* Apply H(i)**T to A(offset+i:m,i+1:n) from the left. |
* Apply H(i)**T to A(offset+i:m,i+1:n) from the left. |
* |
* |