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class | PETScKrylovSolver |
| This class implements Krylov methods for linear systems of the form Ax = b. It is a wrapper for the Krylov solvers of PETSc. More...
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class | PETScMatrix |
| It is a simple wrapper for a PETSc matrix pointer (Mat). Its main purpose is to assist memory management of PETSc Mat objects. More...
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class | PETScOperator |
| This class is a base class for matrices that can be used in PETScKrylovSolver. More...
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class | PETScOptions |
| These class provides static functions that permit users to set and retrieve PETSc options via the PETSc option/parameter system. The option must not be prefixed by '-', e.g. More...
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class | PETScVector |
| It is a simple wrapper for a PETSc vector pointer (Vec). Its main purpose is to assist memory management of PETSc Vec objects. More...
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class | SparsityPattern |
| This class provides a sparsity pattern data structure that can be used to initialize sparse matrices. More...
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class | Vector |
| Distributed vector. More...
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class | VectorSpaceBasis |
| This class defines a basis for vector spaces, typically used for expressing nullspaces of singular operators and 'near nullspaces' used in smoothed aggregation algebraic multigrid. More...
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Mat | create_petsc_matrix (MPI_Comm comm, const SparsityPattern &sparsity_pattern) |
| Create a PETSc Mat. Caller is responsible for destroying the returned object.
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MatNullSpace | create_petsc_nullspace (MPI_Comm comm, const VectorSpaceBasis &nullspace) |
| Create PETSc MatNullSpace. Caller is responsible for destruction returned object.
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Vec | create_ghosted_vector (const common::IndexMap &map, const Eigen::Matrix< PetscScalar, Eigen::Dynamic, 1 > &x) |
| Create a PETSc Vec that wraps the data in x. More...
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void | petsc_error (int error_code, std::string filename, std::string petsc_function) |
| Print error message for PETSc calls that return an error.
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std::vector< IS > | create_petsc_index_sets (const std::vector< const common::IndexMap * > &maps) |
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Vec | create_petsc_vector (const common::IndexMap &map) |
| Create a ghosted PETSc Vec. Caller is responsible for destroying the returned object.
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Vec | create_petsc_vector (MPI_Comm comm, std::array< std::int64_t, 2 > range, const Eigen::Ref< const Eigen::Array< std::int64_t, Eigen::Dynamic, 1 >> &ghost_indices, int block_size) |
| Create a ghosted PETSc Vec. Caller is responsible for destroying the returned object.
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std::vector< Eigen::Matrix< PetscScalar, Eigen::Dynamic, 1 > > | get_local_vectors (const Vec x, const std::vector< const common::IndexMap * > &maps) |
| Copy blocks from Vec into Eigen vectors.
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void | scatter_local_vectors (Vec x, const std::vector< Eigen::Matrix< PetscScalar, Eigen::Dynamic, 1 >> &x_b, const std::vector< const common::IndexMap * > &maps) |
| Scatter local Eigen vectors to Vec.
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Linear algebra interface.
Interface to linear algebra data structures and solvers
std::vector< IS > dolfinx::la::create_petsc_index_sets |
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const std::vector< const common::IndexMap * > & |
maps | ) |
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- Todo:
- This function could take just the local sizes
Compute IndexSets (IS) for stacked index maps. E.g., if map[0] = {0, 1, 2, 3, 4, 5, 6} and map[1] = {0, 1, 2, 4} (in local indices), IS[0] = {0, 1, 2, 3, 4, 5, 6} and IS[1] = {7, 8, 9, 10}. Caller is responsible for destruction of each IS.
- Parameters
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- Returns
- Vector of PETSc Index Sets, created on PETSc_COMM_SELF