version 1.4, 2010/08/06 15:32:23
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version 1.7, 2010/08/13 21:03:45
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SUBROUTINE DGEQR2( M, N, A, LDA, TAU, WORK, INFO ) |
SUBROUTINE DGEQR2( 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 A(i+1:m,i) |
* Generate elementary reflector H(i) to annihilate A(i+1:m,i) |
* |
* |
CALL DLARFP( M-I+1, A( I, I ), A( MIN( I+1, M ), I ), 1, |
CALL DLARFG( M-I+1, A( I, I ), A( MIN( I+1, M ), I ), 1, |
$ TAU( I ) ) |
$ TAU( I ) ) |
IF( I.LT.N ) THEN |
IF( I.LT.N ) THEN |
* |
* |