UNGTSQR_ROW: generates an M-by-N complex matrix Q_out with orthonormal columns from the output of CLATSQR. These N orthonormal columns are the first N columns of a product of complex unitary matrices Q(k)_in of order M, which are returned by CLATSQR in a special format. Q_out = first_N_columns_of( Q(1)_in * Q(2)_in * ... * Q(k)_in ). The input matrices Q(k)_in are stored in row and column blocks in A. See the documentation of CLATSQR for more details on the format of Q(k)_in, where each Q(k)_in is represented by block Householder transformations. This routine calls an auxiliary routine CLARFB_GETT, where the computation is performed on each individual block. The algorithm first sweeps NB-sized column blocks from the right to left starting in the bottom row block and continues to the top row block (hence _ROW in the routine name). This sweep is in reverse order of the order in which CLATSQR generates the output blocks.
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| pure subroutine | cungtsqr_row (m, n, mb, nb, a, lda, t, ldt, work, lwork, info) |
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| | la_cungtsqr_row |
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| | la_wungtsqr_row |
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| pure subroutine | zungtsqr_row (m, n, mb, nb, a, lda, t, ldt, work, lwork, info) |
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| | la_zungtsqr_row |
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UNGTSQR_ROW: generates an M-by-N complex matrix Q_out with orthonormal columns from the output of CLATSQR. These N orthonormal columns are the first N columns of a product of complex unitary matrices Q(k)_in of order M, which are returned by CLATSQR in a special format. Q_out = first_N_columns_of( Q(1)_in * Q(2)_in * ... * Q(k)_in ). The input matrices Q(k)_in are stored in row and column blocks in A. See the documentation of CLATSQR for more details on the format of Q(k)_in, where each Q(k)_in is represented by block Householder transformations. This routine calls an auxiliary routine CLARFB_GETT, where the computation is performed on each individual block. The algorithm first sweeps NB-sized column blocks from the right to left starting in the bottom row block and continues to the top row block (hence _ROW in the routine name). This sweep is in reverse order of the order in which CLATSQR generates the output blocks.
◆ cungtsqr_row()
| pure subroutine la_lapack::ungtsqr_row::cungtsqr_row |
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integer(ilp), intent(in) |
m, |
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integer(ilp), intent(in) |
n, |
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integer(ilp), intent(in) |
mb, |
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integer(ilp), intent(in) |
nb, |
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complex(sp), dimension(lda,*), intent(inout) |
a, |
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integer(ilp), intent(in) |
lda, |
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complex(sp), dimension(ldt,*), intent(in) |
t, |
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integer(ilp), intent(in) |
ldt, |
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complex(sp), dimension(*), intent(out) |
work, |
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integer(ilp), intent(in) |
lwork, |
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integer(ilp), intent(out) |
info |
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◆ la_cungtsqr_row()
| la_lapack::ungtsqr_row::la_cungtsqr_row |
◆ la_wungtsqr_row()
| la_lapack::ungtsqr_row::la_wungtsqr_row |
◆ la_zungtsqr_row()
| la_lapack::ungtsqr_row::la_zungtsqr_row |
◆ zungtsqr_row()
| pure subroutine la_lapack::ungtsqr_row::zungtsqr_row |
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integer(ilp), intent(in) |
m, |
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integer(ilp), intent(in) |
n, |
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integer(ilp), intent(in) |
mb, |
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integer(ilp), intent(in) |
nb, |
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complex(dp), dimension(lda,*), intent(inout) |
a, |
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integer(ilp), intent(in) |
lda, |
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complex(dp), dimension(ldt,*), intent(in) |
t, |
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integer(ilp), intent(in) |
ldt, |
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complex(dp), dimension(*), intent(out) |
work, |
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integer(ilp), intent(in) |
lwork, |
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integer(ilp), intent(out) |
info |
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The documentation for this interface was generated from the following file:
1.9.8