LAEXC: swaps adjacent diagonal blocks T11 and T22 of order 1 or 2 in an upper quasi-triangular matrix T by an orthogonal similarity transformation. T must be in Schur canonical form, that is, block upper triangular with 1-by-1 and 2-by-2 diagonal blocks; each 2-by-2 diagonal block has its diagonal elements equal and its off-diagonal elements of opposite sign.
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| subroutine | dlaexc (wantq, n, t, ldt, q, ldq, j1, n1, n2, work, info) |
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| | la_dlaexc |
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| | la_qlaexc |
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| subroutine | slaexc (wantq, n, t, ldt, q, ldq, j1, n1, n2, work, info) |
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| | la_slaexc |
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LAEXC: swaps adjacent diagonal blocks T11 and T22 of order 1 or 2 in an upper quasi-triangular matrix T by an orthogonal similarity transformation. T must be in Schur canonical form, that is, block upper triangular with 1-by-1 and 2-by-2 diagonal blocks; each 2-by-2 diagonal block has its diagonal elements equal and its off-diagonal elements of opposite sign.
◆ dlaexc()
| subroutine la_lapack::laexc::dlaexc |
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logical(lk), intent(in) | wantq, |
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integer(ilp), intent(in) | n, |
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real(dp), dimension(ldt,*), intent(inout) | t, |
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integer(ilp), intent(in) | ldt, |
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real(dp), dimension(ldq,*), intent(inout) | q, |
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integer(ilp), intent(in) | ldq, |
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integer(ilp), intent(in) | j1, |
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integer(ilp), intent(in) | n1, |
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integer(ilp), intent(in) | n2, |
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real(dp), dimension(*), intent(out) | work, |
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integer(ilp), intent(out) | info ) |
◆ la_dlaexc()
| la_lapack::laexc::la_dlaexc |
◆ la_qlaexc()
| la_lapack::laexc::la_qlaexc |
◆ la_slaexc()
| la_lapack::laexc::la_slaexc |
◆ slaexc()
| subroutine la_lapack::laexc::slaexc |
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logical(lk), intent(in) | wantq, |
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integer(ilp), intent(in) | n, |
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real(sp), dimension(ldt,*), intent(inout) | t, |
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integer(ilp), intent(in) | ldt, |
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real(sp), dimension(ldq,*), intent(inout) | q, |
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integer(ilp), intent(in) | ldq, |
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integer(ilp), intent(in) | j1, |
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integer(ilp), intent(in) | n1, |
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integer(ilp), intent(in) | n2, |
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real(sp), dimension(*), intent(out) | work, |
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integer(ilp), intent(out) | info ) |
The documentation for this interface was generated from the following file:
