PCGAMGSetAggressiveSquareGraph

Use graph square A’A for aggressive coarsening, old method

Synopsis

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

Logically Collective

Input Parameters

• pc - the preconditioner context

• b - default false - MIS-k is faster

Options Database Key

• -pc_gamg_aggressive_square_graph <bool,default=false> - Use square graph (A’A) or MIS-k (k=2) for aggressive coarsening

See Also

the Users Manual section on PCGAMG, the Users Manual section on PCMG, KSP: Linear System Solvers, PCGAMG, PCGAMGSetThreshold(), PCGAMGSetAggressiveLevels(), PCGAMGMISkSetAggressive(), PCGAMGMISkSetMinDegreeOrdering(), PCGAMGSetLowMemoryFilter()

Level

intermediate

Location

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

Examples

src/ksp/ksp/tutorials/ex56.c

Implementations

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

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