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version 1.17, 2020/05/21 21:46:04
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* |
* |
* =========== DOCUMENTATION =========== |
* =========== DOCUMENTATION =========== |
* |
* |
* Online html documentation available at |
* Online html documentation available at |
* http://www.netlib.org/lapack/explore-html/ |
* http://www.netlib.org/lapack/explore-html/ |
* |
* |
*> \htmlonly |
*> \htmlonly |
*> Download ZGEQR2P + dependencies |
*> Download ZGEQR2P + dependencies |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/zgeqr2p.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/zgeqr2p.f"> |
*> [TGZ]</a> |
*> [TGZ]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/zgeqr2p.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/zgeqr2p.f"> |
*> [ZIP]</a> |
*> [ZIP]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/zgeqr2p.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/zgeqr2p.f"> |
*> [TXT]</a> |
*> [TXT]</a> |
*> \endhtmlonly |
*> \endhtmlonly |
* |
* |
* Definition: |
* Definition: |
* =========== |
* =========== |
* |
* |
* SUBROUTINE ZGEQR2P( M, N, A, LDA, TAU, WORK, INFO ) |
* SUBROUTINE ZGEQR2P( M, N, A, LDA, TAU, WORK, INFO ) |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
* INTEGER INFO, LDA, M, N |
* INTEGER INFO, LDA, M, N |
* .. |
* .. |
* .. Array Arguments .. |
* .. Array Arguments .. |
* COMPLEX*16 A( LDA, * ), TAU( * ), WORK( * ) |
* COMPLEX*16 A( LDA, * ), TAU( * ), WORK( * ) |
* .. |
* .. |
* |
* |
* |
* |
*> \par Purpose: |
*> \par Purpose: |
* ============= |
* ============= |
*> |
*> |
*> \verbatim |
*> \verbatim |
*> |
*> |
*> ZGEQR2P computes a QR factorization of a complex m by n matrix A: |
*> ZGEQR2P computes a QR factorization of a complex m-by-n matrix A: |
*> A = Q * R. The diagonal entries of R are real and nonnegative. |
*> |
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*> A = Q * ( R ), |
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*> ( 0 ) |
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*> |
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*> where: |
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*> |
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*> Q is a m-by-m orthogonal matrix; |
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*> R is an upper-triangular n-by-n matrix with nonnegative diagonal |
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*> entries; |
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*> 0 is a (m-n)-by-n zero matrix, if m > n. |
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*> |
*> \endverbatim |
*> \endverbatim |
* |
* |
* Arguments: |
* Arguments: |
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*> On entry, the m by n matrix A. |
*> On entry, the m by n matrix A. |
*> On exit, the elements on and above the diagonal of the array |
*> On exit, the elements on and above the diagonal of the array |
*> contain the min(m,n) by n upper trapezoidal matrix R (R is |
*> contain the min(m,n) by n upper trapezoidal matrix R (R is |
*> upper triangular if m >= n). The diagonal entries of R |
*> upper triangular if m >= n). The diagonal entries of R |
*> are real and nonnegative; the elements below the diagonal, |
*> are real and nonnegative; the elements below the diagonal, |
*> with the array TAU, represent the unitary matrix Q as a |
*> with the array TAU, represent the unitary matrix Q as a |
*> product of elementary reflectors (see Further Details). |
*> product of elementary reflectors (see Further Details). |
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* Authors: |
* Authors: |
* ======== |
* ======== |
* |
* |
*> \author Univ. of Tennessee |
*> \author Univ. of Tennessee |
*> \author Univ. of California Berkeley |
*> \author Univ. of California Berkeley |
*> \author Univ. of Colorado Denver |
*> \author Univ. of Colorado Denver |
*> \author NAG Ltd. |
*> \author NAG Ltd. |
* |
* |
*> \date November 2015 |
*> \date November 2019 |
* |
* |
*> \ingroup complex16GEcomputational |
*> \ingroup complex16GEcomputational |
* |
* |
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* ===================================================================== |
* ===================================================================== |
SUBROUTINE ZGEQR2P( M, N, A, LDA, TAU, WORK, INFO ) |
SUBROUTINE ZGEQR2P( M, N, A, LDA, TAU, WORK, INFO ) |
* |
* |
* -- LAPACK computational routine (version 3.6.0) -- |
* -- LAPACK computational routine (version 3.9.0) -- |
* -- 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 2015 |
* November 2019 |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
INTEGER INFO, LDA, M, N |
INTEGER INFO, LDA, M, N |