petsc-3.14.6 2021-03-30

KSPGetOperators

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

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

Collective on ksp

ksp

- the KSP context

	Amat	- the matrix that defines the linear system
	Pmat	- the matrix to be used in constructing the preconditioner, usually the same as Amat.

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

intermediate