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version 1.7, 2010/12/21 13:53:25
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version 1.8, 2011/07/22 07:38:05
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| SUBROUTINE DGEQLF( M, N, A, LDA, TAU, WORK, LWORK, INFO ) |
SUBROUTINE DGEQLF( M, N, 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, LDA, LWORK, M, N |
INTEGER INFO, LDA, LWORK, M, N |
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| * |
* |
| * Each H(i) has the form |
* Each H(i) has the form |
| * |
* |
| * H(i) = I - tau * v * v' |
* H(i) = I - tau * v * v**T |
| * |
* |
| * where tau is a real scalar, and v is a real vector with |
* where tau is a real scalar, and v is a real vector with |
| * v(m-k+i+1:m) = 0 and v(m-k+i) = 1; v(1:m-k+i-1) is stored on exit in |
* v(m-k+i+1:m) = 0 and v(m-k+i) = 1; v(1:m-k+i-1) is stored on exit in |
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| CALL DLARFT( 'Backward', 'Columnwise', M-K+I+IB-1, IB, |
CALL DLARFT( 'Backward', 'Columnwise', M-K+I+IB-1, IB, |
| $ A( 1, N-K+I ), LDA, TAU( I ), WORK, LDWORK ) |
$ A( 1, N-K+I ), LDA, TAU( I ), WORK, LDWORK ) |
| * |
* |
| * Apply H' to A(1:m-k+i+ib-1,1:n-k+i-1) from the left |
* Apply H**T to A(1:m-k+i+ib-1,1:n-k+i-1) from the left |
| * |
* |
| CALL DLARFB( 'Left', 'Transpose', 'Backward', |
CALL DLARFB( 'Left', 'Transpose', 'Backward', |
| $ 'Columnwise', M-K+I+IB-1, N-K+I-1, IB, |
$ 'Columnwise', M-K+I+IB-1, N-K+I-1, IB, |
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