PETScKrylovSolver¶
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class
dolfin.cpp.la.
PETScKrylovSolver
(*args)¶ Bases:
dolfin.cpp.la.GenericLinearSolver
,dolfin.cpp.la.PETScObject
This class implements Krylov methods for linear systems of the form Ax = b. It is a wrapper for the Krylov solvers of PETSc.
Overloaded versions
PETScKrylovSolver(comm, method=”default”, preconditioner=”default”)
Create Krylov solver for a particular method and named preconditioner
PETScKrylovSolver(method=”default”, preconditioner=”default”)
Create Krylov solver for a particular method and named preconditioner
PETScKrylovSolver(comm, method, preconditioner)
Create Krylov solver for a particular method and PETScPreconditioner (shared_ptr version)
PETScKrylovSolver(method, preconditioner)
Create Krylov solver for a particular method and PETScPreconditioner (shared_ptr version)
PETScKrylovSolver(comm, method, preconditioner)
Create Krylov solver for a particular method and PETScPreconditioner (shared_ptr version)
PETScKrylovSolver(method, preconditioner)
Create Krylov solver for a particular method and PETScPreconditioner (shared_ptr version)
PETScKrylovSolver(ksp)
Create solver wrapper of a PETSc KSP object
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static
default_parameters
()¶ Default parameter values
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get_norm_type
()¶ Get norm type used in convergence testing
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get_options_prefix
()¶ Returns the prefix used by PETSc when searching the PETSc options database
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ksp
()¶ Return petsc4py representation of PETSc KSP solver
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static
methods
()¶ Return a list of available solver methods
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monitor
()¶ Monitor residual at each iteration
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mpi_comm
()¶ Return MPI communicator
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norm_type_default_norm
= 1¶
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norm_type_natural
= 4¶
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norm_type_none
= 0¶
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norm_type_preconditioned
= 2¶
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norm_type_unpreconditioned
= 3¶
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static
preconditioners
()¶ Return a list of available named preconditioners
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set_from_options
()¶ Set options from PETSc options database
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set_nonzero_guess
()¶ Use nonzero intial guess for solution function (nonzero_guess=true, the solution vector x will not be zeroed before the solver starts)
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set_norm_type
()¶ Set norm type used in convergence testing - not all solvers types support all norm types
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set_options_prefix
()¶ Sets the prefix used by PETSc when searching the PETSc options database
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set_reuse_preconditioner
()¶ Reuse preconditioner if true, even if matrix operator changes (by default preconditioner will be re-built if the matrix changes)
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set_tolerances
()¶ Set tolerances (relative residual, alsolute residial, maximum number of iterations)
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solve
()¶ Overloaded versions
solve(x, b)
Solve linear system Ax = b and return number of iterations
solve(x, b)
Solve linear system Ax = b and return number of iterations
solve(A, x, b)
Solve linear system Ax = b and return number of iterations
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thisown
¶ The membership flag