#include "petscmat.h" PetscErrorCode MatSetUnfactored(Mat mat)Collective on Mat
Note that one can specify in-place ILU(0) factorization by calling
PCType(pc,PCILU); PCFactorSeUseInPlace(pc);or by using the options -pc_type ilu -pc_factor_in_place
In-place factorization ILU(0) can also be used as a local solver for the blocks within the block Jacobi or additive Schwarz methods (runtime option: -sub_pc_factor_in_place). See the discussion of these preconditioners in the users manual for details on setting local solver options.
Most users should employ the simplified KSP interface for linear solvers instead of working directly with matrix algebra routines such as this. See, e.g., KSPCreate().
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages