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Reference documentation for deal.II version 8.1.0
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#include <precondition.h>
Classes | |
struct | AdditionalData |
Public Member Functions | |
template<class MATRIX > | |
void | initialize (const MATRIX &matrix, const AdditionalData &additional_data=AdditionalData()) |
template<class VECTOR > | |
void | vmult (VECTOR &, const VECTOR &) const |
template<class VECTOR > | |
void | Tvmult (VECTOR &, const VECTOR &) const |
template<class VECTOR > | |
void | vmult_add (VECTOR &, const VECTOR &) const |
template<class VECTOR > | |
void | Tvmult_add (VECTOR &, const VECTOR &) const |
void | clear () |
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Subscriptor () | |
Subscriptor (const Subscriptor &) | |
virtual | ~Subscriptor () |
Subscriptor & | operator= (const Subscriptor &) |
void | subscribe (const char *identifier=0) const |
void | unsubscribe (const char *identifier=0) const |
unsigned int | n_subscriptions () const |
void | list_subscribers () const |
DeclException3 (ExcInUse, int, char *, std::string &,<< "Object of class "<< arg2<< " is still used by "<< arg1<< " other objects.\n"<< "(Additional information: "<< arg3<< ")\n"<< "Note the entry in the Frequently Asked Questions of "<< "deal.II (linked to from http://www.dealii.org/) for "<< "more information on what this error means.") | |
DeclException2 (ExcNoSubscriber, char *, char *,<< "No subscriber with identifier \""<< arg2<< "\" did subscribe to this object of class "<< arg1) | |
template<class Archive > | |
void | serialize (Archive &ar, const unsigned int version) |
No preconditioning. This class helps you, if you want to use a linear solver without preconditioning. All solvers in LAC require a preconditioner. Therefore, you must use the identity provided here to avoid preconditioning. It can be used in the following way:
See the step-3 tutorial program for an example and additional explanations.
Alternatively, the IdentityMatrix class can be used to precondition in this way.
Definition at line 73 of file precondition.h.
void PreconditionIdentity::initialize | ( | const MATRIX & | matrix, |
const AdditionalData & | additional_data = AdditionalData() |
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The matrix argument is ignored and here just for compatibility with more complex preconditioners.
void PreconditionIdentity::vmult | ( | VECTOR & | , |
const VECTOR & | |||
) | const |
Apply preconditioner.
void PreconditionIdentity::Tvmult | ( | VECTOR & | , |
const VECTOR & | |||
) | const |
Apply transpose preconditioner. Since this is the identity, this function is the same as vmult().
void PreconditionIdentity::vmult_add | ( | VECTOR & | , |
const VECTOR & | |||
) | const |
Apply preconditioner, adding to the previous value.
void PreconditionIdentity::Tvmult_add | ( | VECTOR & | , |
const VECTOR & | |||
) | const |
Apply transpose preconditioner, adding. Since this is the identity, this function is the same as vmult_add().
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inline |
This function is only present to provide the interface of a preconditioner to be handed to a smoother. This does nothing.
Definition at line 142 of file precondition.h.