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enum class | tlapack::QRIterationVariant : char { MultiShift = 'M'
, DoubleShift = 'D'
} |
| Variant of the algorithm that performs QR iterations on an upper Hessenberg matrix.
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template<TLAPACK_MATRIX matrix_t, TLAPACK_VECTOR vector_t, enable_if_t< is_complex< type_t< vector_t > >, int > = 0> |
int | tlapack::qr_iteration (bool want_t, bool want_z, size_type< matrix_t > ilo, size_type< matrix_t > ihi, matrix_t &A, vector_t &w, matrix_t &Z, QRIterationOpts &opts) |
| Computes the eigenvalues and optionally the Schur factorization of an upper Hessenberg matrix.
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template<TLAPACK_MATRIX matrix_t, TLAPACK_VECTOR vector_t, TLAPACK_WORKSPACE work_t, enable_if_t< is_complex< type_t< vector_t > >, int > = 0> |
int | tlapack::qr_iteration_work (bool want_t, bool want_z, size_type< matrix_t > ilo, size_type< matrix_t > ihi, matrix_t &A, vector_t &w, matrix_t &Z, work_t &work, QRIterationOpts &opts) |
| Computes the eigenvalues and optionally the Schur factorization of an upper Hessenberg matrix. Workspace is provided as an argument.
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template<class T , TLAPACK_MATRIX matrix_t, TLAPACK_VECTOR vector_t, enable_if_t< is_complex< type_t< vector_t > >, int > = 0> |
constexpr WorkInfo | tlapack::qr_iteration_worksize (bool want_t, bool want_z, size_type< matrix_t > ilo, size_type< matrix_t > ihi, const matrix_t &A, const vector_t &w, const matrix_t &Z, const QRIterationOpts &opts={}) |
| Worspace query of qr_iteration()
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- Author
- Weslley S Pereira, University of Colorado Denver, USA