DMKSPSetComputeOperators#

set KSP matrix evaluation function

Synopsis#

#include "petscksp.h" 
PetscErrorCode DMKSPSetComputeOperators(DM dm, PetscErrorCode (*func)(KSP, Mat, Mat, void *), void *ctx)

Not Collective

Input Parameters#

  • dm - DM to be used with KSP

  • func - matrix evaluation function, for calling sequence see KSPSetComputeOperators()

  • ctx - context for matrix evaluation

Note#

KSPSetComputeOperators() is normally used, but it calls this function internally because the user context is actually associated with the DM. This makes the interface consistent regardless of whether the user interacts with a DM or not.

Developer Note#

If DM took a more central role at some later date, this could become the primary method of setting the matrix.

See Also#

KSP: Linear System Solvers, DMKSP, DM, KSP, DMKSPSetContext(), DMKSPGetComputeOperators(), KSPSetOperators()

Level#

developer

Location#

src/ksp/ksp/interface/dmksp.c

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