KSPGetOperators

Gets the matrix associated with the linear system and a (possibly) different one used to construct the preconditioner.

Synopsis

#include "petscksp.h" 
PetscErrorCode KSPGetOperators(KSP ksp, Mat *Amat, Mat *Pmat)

Collective

Input Parameter

• ksp - the KSP context

Output Parameters

• Amat - the matrix that defines the linear system

• Pmat - the matrix to be used in constructing the preconditioner, usually the same as Amat.

Note

DOES NOT increase the reference counts of the matrix, so you should NOT destroy them.

See Also

KSP: Linear System Solvers, KSP, KSPSolve(), KSPGetPC(), PCGetOperators(), PCSetOperators(), KSPSetOperators(), KSPGetOperatorsSet()

Level

intermediate

Location

src/ksp/ksp/interface/itcreate.c

Examples

src/ksp/ksp/tutorials/ex42.c
src/ksp/ksp/tutorials/ex27.c
src/ksp/ksp/tutorials/ex34.c
src/ksp/ksp/tutorials/ex59.c
src/ksp/ksp/tutorials/ex25.c
src/ksp/ksp/tutorials/ex45.c

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Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages