PCGAMGSetGraphSymmetrize

Symmetrize graph used for coarsening. Defaults to true, but if matrix has symmetric attribute, then not needed since the graph is already known to be symmetric

Synopsis

#include "petscpc.h" 
PetscErrorCode PCGAMGSetGraphSymmetrize(PC pc, PetscBool b)

Logically Collective

Input Parameters

• pc - the preconditioner context

• b - default true

Options Database Key

• -pc_gamg_graph_symmetrize <bool,default=true> - the flag

See Also

the Users Manual section on PCGAMG, the Users Manual section on PCMG, PCGAMG, PCGAMGSetThreshold(), PCGAMGSetAggressiveLevels(), MatCreateGraph(), PCGAMGMISkSetAggressive(), PCGAMGSetAggressiveSquareGraph(), PCGAMGMISkSetMinDegreeOrdering()

Level

intermediate

Location

src/ksp/pc/impls/gamg/agg.c

Implementations

PCGAMGSetGraphSymmetrize_AGG() in src/ksp/pc/impls/gamg/agg.c

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