version 1.3, 2010/08/06 15:28:36
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version 1.8, 2010/12/21 13:53:25
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SUBROUTINE DGEQPF( M, N, A, LDA, JPVT, TAU, WORK, INFO ) |
SUBROUTINE DGEQPF( M, N, A, LDA, JPVT, TAU, WORK, INFO ) |
* |
* |
* -- LAPACK deprecated driver routine (version 3.2) -- |
* -- LAPACK deprecated computational 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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* Partial column norm updating strategy modified by |
* Partial column norm updating strategy modified by |
* Z. Drmac and Z. Bujanovic, Dept. of Mathematics, |
* Z. Drmac and Z. Bujanovic, Dept. of Mathematics, |
* University of Zagreb, Croatia. |
* University of Zagreb, Croatia. |
* June 2006. |
* June 2010 |
* For more details see LAPACK Working Note 176. |
* For more details see LAPACK Working Note 176. |
* |
* |
* ===================================================================== |
* ===================================================================== |
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DOUBLE PRECISION AII, TEMP, TEMP2, TOL3Z |
DOUBLE PRECISION AII, TEMP, TEMP2, TOL3Z |
* .. |
* .. |
* .. External Subroutines .. |
* .. External Subroutines .. |
EXTERNAL DGEQR2, DLARF, DLARFP, DORM2R, DSWAP, XERBLA |
EXTERNAL DGEQR2, DLARF, DLARFG, DORM2R, DSWAP, XERBLA |
* .. |
* .. |
* .. Intrinsic Functions .. |
* .. Intrinsic Functions .. |
INTRINSIC ABS, MAX, MIN, SQRT |
INTRINSIC ABS, MAX, MIN, SQRT |
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* Generate elementary reflector H(i) |
* Generate elementary reflector H(i) |
* |
* |
IF( I.LT.M ) THEN |
IF( I.LT.M ) THEN |
CALL DLARFP( M-I+1, A( I, I ), A( I+1, I ), 1, TAU( I ) ) |
CALL DLARFG( M-I+1, A( I, I ), A( I+1, I ), 1, TAU( I ) ) |
ELSE |
ELSE |
CALL DLARFP( 1, A( M, M ), A( M, M ), 1, TAU( M ) ) |
CALL DLARFG( 1, A( M, M ), A( M, M ), 1, TAU( M ) ) |
END IF |
END IF |
* |
* |
IF( I.LT.N ) THEN |
IF( I.LT.N ) THEN |