version 1.1, 2017/06/17 11:02:50
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version 1.4, 2020/05/21 21:46:01
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*> \brief \b DLATSQR |
* |
* |
* Definition: |
* Definition: |
* =========== |
* =========== |
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*> \verbatim |
*> \verbatim |
*> |
*> |
*> DLATSQR computes a blocked Tall-Skinny QR factorization of |
*> DLATSQR computes a blocked Tall-Skinny QR factorization of |
*> an M-by-N matrix A, where M >= N: |
*> a real M-by-N matrix A for M >= N: |
*> A = Q * R . |
*> |
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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, stored on exit in an implicit |
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*> form in the elements below the digonal of the array A and in |
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*> the elemenst of the array T; |
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*> |
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*> R is an upper-triangular N-by-N matrix, stored on exit in |
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*> the elements on and above the diagonal of the array A. |
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*> |
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*> 0 is a (M-N)-by-N zero matrix, and is not stored. |
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*> |
*> \endverbatim |
*> \endverbatim |
* |
* |
* Arguments: |
* Arguments: |
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SUBROUTINE DLATSQR( M, N, MB, NB, A, LDA, T, LDT, WORK, |
SUBROUTINE DLATSQR( M, N, MB, NB, A, LDA, T, LDT, WORK, |
$ LWORK, INFO) |
$ LWORK, INFO) |
* |
* |
* -- LAPACK computational routine (version 3.7.0) -- |
* -- 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. -- |
* December 2016 |
* November 2019 |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
INTEGER INFO, LDA, M, N, MB, NB, LDT, LWORK |
INTEGER INFO, LDA, M, N, MB, NB, LDT, LWORK |