OPGTR: generates a real orthogonal matrix Q which is defined as the product of n-1 elementary reflectors H(i) of order n, as returned by DSPTRD using packed storage: if UPLO = 'U', Q = H(n-1) . . . H(2) H(1), if UPLO = 'L', Q = H(1) H(2) . . . H(n-1).
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| pure subroutine | dopgtr (uplo, n, ap, tau, q, ldq, work, info) |
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| | la_dopgtr |
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| | la_qopgtr |
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| pure subroutine | sopgtr (uplo, n, ap, tau, q, ldq, work, info) |
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| | la_sopgtr |
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OPGTR: generates a real orthogonal matrix Q which is defined as the product of n-1 elementary reflectors H(i) of order n, as returned by DSPTRD using packed storage: if UPLO = 'U', Q = H(n-1) . . . H(2) H(1), if UPLO = 'L', Q = H(1) H(2) . . . H(n-1).
◆ dopgtr()
| pure subroutine la_lapack::opgtr::dopgtr |
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character, intent(in) | uplo, |
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integer(ilp), intent(in) | n, |
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real(dp), dimension(*), intent(in) | ap, |
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real(dp), dimension(*), intent(in) | tau, |
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real(dp), dimension(ldq,*), intent(out) | q, |
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integer(ilp), intent(in) | ldq, |
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real(dp), dimension(*), intent(out) | work, |
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integer(ilp), intent(out) | info ) |
◆ la_dopgtr()
| la_lapack::opgtr::la_dopgtr |
◆ la_qopgtr()
| la_lapack::opgtr::la_qopgtr |
◆ la_sopgtr()
| la_lapack::opgtr::la_sopgtr |
◆ sopgtr()
| pure subroutine la_lapack::opgtr::sopgtr |
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character, intent(in) | uplo, |
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integer(ilp), intent(in) | n, |
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real(sp), dimension(*), intent(in) | ap, |
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real(sp), dimension(*), intent(in) | tau, |
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real(sp), dimension(ldq,*), intent(out) | q, |
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integer(ilp), intent(in) | ldq, |
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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:
