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.. meta::
:description: rocSOLVER refactorization and direct solvers API documentation
:keywords: rocSOLVER, ROCm, API, documentation, refactorization, direct solvers
.. _refactor:
**********************************************
rocSOLVER refactorization and direct solvers
**********************************************
These functions implement direct solvers for sparse systems with
different coefficient matrices that share the same sparsity pattern.
The refactorization functions are divided into the following categories:
* :ref:`rfinit`: Basic functions to initialize and destroy meta data.
* :ref:`rfrefact`: Refactorization of new matrices given a known sparsity pattern.
* :ref:`rfsolver`: Based on triangular refactorization.
.. note::
The API descriptions use the following notations:
* ``i``, ``j``, and ``k`` are used as general purpose indices. In some legacy LAPACK APIs, ``k`` can be
a parameter indicating some problem or matrix dimension.
* Depending on the context, when it is necessary to index rows, columns, and blocks or submatrices,
``i`` is assigned to rows, ``j`` to columns, and ``k`` to blocks. ``l`` is always used to index
matrices or problems in a batch.
* ``x[i]`` stands for the i-th element of vector x, while ``A[i,j]`` represents the element
in the i-th row and j-th column of matrix ``A``. Indices are 1-based, for instance, ``x[1]`` is the first
element of ``x``.
* To identify a block in a matrix or a matrix in the batch, ``k`` and ``l`` are used as sub-indices
* ``x_i`` :math:`=x_i`. Both notations are used, :math:`x_i` when displaying mathematical
equations and ``x_i`` in the text describing the function parameters.
* If ``X`` is a real vector or matrix, :math:`X^T` indicates its transpose. If ``X`` is complex, then
:math:`X^H` represents its conjugate transpose. When ``X`` could be real or complex, the descriptions use ``X'`` to
indicate ``X`` transposed or ``X`` conjugate transposed, accordingly.
* When a matrix ``A`` is formed as the product of several matrices, the following notation is used:
``A=M(1)M(2)...M(t)``.
.. _rfinit:
Initialization and meta data
==================================
.. contents:: List of initialization functions
:local:
:backlinks: top
.. _rfinfocreate:
rocsolver_create_rfinfo()
---------------------------------------
.. doxygenfunction:: rocsolver_create_rfinfo
.. _rfinfodestroy:
rocsolver_destroy_rfinfo()
---------------------------------------
.. doxygenfunction:: rocsolver_destroy_rfinfo
.. _rfinfoset:
rocsolver_set_rfinfo_mode()
---------------------------------------
.. doxygenfunction:: rocsolver_set_rfinfo_mode
.. _rfinfoget:
rocsolver_get_rfinfo_mode()
---------------------------------------
.. doxygenfunction:: rocsolver_get_rfinfo_mode
.. _rfanalysis:
rocsolver_csrrf_analysis()
--------------------------------------
.. doxygenfunction:: rocsolver_dcsrrf_analysis
:outline:
.. doxygenfunction:: rocsolver_scsrrf_analysis
.. _rfrefact:
Triangular refactorization
==================================
.. contents:: List of refactorization functions
:local:
:backlinks: top
.. _rfsumlu:
rocsolver_<type>csrrf_sumlu()
----------------------------------
.. doxygenfunction:: rocsolver_dcsrrf_sumlu
:outline:
.. doxygenfunction:: rocsolver_scsrrf_sumlu
.. _rfsplitlu:
rocsolver_<type>csrrf_splitlu()
------------------------------------
.. doxygenfunction:: rocsolver_dcsrrf_splitlu
:outline:
.. doxygenfunction:: rocsolver_scsrrf_splitlu
.. _rfrefactlu:
rocsolver_<type>csrrf_refactlu()
------------------------------------
.. doxygenfunction:: rocsolver_dcsrrf_refactlu
:outline:
.. doxygenfunction:: rocsolver_scsrrf_refactlu
.. _rfrefactchol:
rocsolver_<type>csrrf_refactchol()
------------------------------------
.. doxygenfunction:: rocsolver_dcsrrf_refactchol
:outline:
.. doxygenfunction:: rocsolver_scsrrf_refactchol
.. _rfsolver:
Direct sparse solvers
==================================
.. contents:: List of direct solvers
:local:
:backlinks: top
.. _rfsolve:
rocsolver_<type>csrrf_solve()
----------------------------------
.. doxygenfunction:: rocsolver_dcsrrf_solve
:outline:
.. doxygenfunction:: rocsolver_scsrrf_solve