gemseo_petsc / linear_solvers

ksp_lib module¶

A PETSC KSP linear solvers library wrapper.

class gemseo_petsc.linear_solvers.ksp_lib.PetscKSPAlgos[source]¶

Bases: LinearSolverLib

Interface to PETSC KSP.

For further information, please read https://petsc4py.readthedocs.io/en/stable/manual/ksp/

https://petsc.org/release/docs/manualpages/KSP/KSP.html#KSP

driver_has_option(option_name)¶

Check the existence of an option.

Parameters:: option_name (str) – The name of the option.
Returns:: Whether the option exists.
Return type:: bool

execute(problem, algo_name=None, **options)¶

Execute the driver.

Parameters:

problem (Any) – The problem to be solved.
algo_name (Optional[str]) – The name of the algorithm. If None, use algo_name attribute which may have been set by the factory.
**options (Any) – The algorithm options.

Return type:

None

filter_adapted_algorithms(problem)¶

Filter the algorithms capable of solving the problem.

Parameters:: problem (Any) – The problem to be solved.
Returns:: The names of the algorithms adapted to this problem.
Return type:: list[str]

init_options_grammar(algo_name)¶

Initialize the options grammar.

Parameters:: algo_name (str) – The name of the algorithm.
Return type:: JSONGrammar

static is_algorithm_suited(algorithm_description, problem)¶

Check if the algorithm is suited to the problem according to algo_dict.

Parameters:

algorithm_description (LinearSolverDescription) – The description of the algorithm.
problem (LinearProblem) – The problem to be solved.

Returns:

Whether the algorithm suits.

Return type:

bool

solve(linear_problem, algo_name, **options)¶

Solve the linear system.

Parameters:

linear_problem (LinearProblem) – The problem to solve.
algo_name (str) – The name of the algorithm.
**options (Any) – The algorithm options.

Returns:

The execution result.

Return type:

Any

LIBRARY_NAME: ClassVar[str | None] = None¶: The name of the interfaced library.

OPTIONS_DIR: Final[str] = 'options'¶: The name of the directory containing the files of the grammars of the options.

OPTIONS_MAP: dict[str, str] = {}¶: The names of the options in GEMSEO mapping to those in the wrapped library.

SAVE_WHEN_FAIL = 'save_when_fail'¶

algo_name: str | None¶: The name of the algorithm used currently.

property algorithms: list[str]¶: The available algorithms.

descriptions: dict[str, AlgorithmDescription]¶: The description of the algorithms contained in the library.

internal_algo_name: str | None¶

The internal name of the algorithm used currently.

It typically corresponds to the name of the algorithm in the wrapped library if any.

opt_grammar: JSONGrammar | None¶: The grammar defining the options of the current algorithm.

problem: Any | None¶: The problem to be solved.

save_fpath: str | None¶: The file path to save the linear problem.

property solution: ndarray¶: The solution of the problem.