version 1.4, 2010/08/06 15:32:23
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version 1.7, 2010/08/13 21:03:44
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SUBROUTINE DGEQL2( M, N, A, LDA, TAU, WORK, INFO ) |
SUBROUTINE DGEQL2( M, N, A, LDA, TAU, WORK, INFO ) |
* |
* |
* -- LAPACK routine (version 3.2) -- |
* -- LAPACK routine (version 3.2.2) -- |
* -- 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 |
* June 2010 |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
INTEGER INFO, LDA, M, N |
INTEGER INFO, LDA, M, N |
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DOUBLE PRECISION AII |
DOUBLE PRECISION AII |
* .. |
* .. |
* .. External Subroutines .. |
* .. External Subroutines .. |
EXTERNAL DLARF, DLARFP, XERBLA |
EXTERNAL DLARF, DLARFG, XERBLA |
* .. |
* .. |
* .. Intrinsic Functions .. |
* .. Intrinsic Functions .. |
INTRINSIC MAX, MIN |
INTRINSIC MAX, MIN |
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* Generate elementary reflector H(i) to annihilate |
* Generate elementary reflector H(i) to annihilate |
* A(1:m-k+i-1,n-k+i) |
* A(1:m-k+i-1,n-k+i) |
* |
* |
CALL DLARFP( M-K+I, A( M-K+I, N-K+I ), A( 1, N-K+I ), 1, |
CALL DLARFG( M-K+I, A( M-K+I, N-K+I ), A( 1, N-K+I ), 1, |
$ TAU( I ) ) |
$ TAU( I ) ) |
* |
* |
* Apply H(i) to A(1:m-k+i,1:n-k+i-1) from the left |
* Apply H(i) to A(1:m-k+i,1:n-k+i-1) from the left |