PCGASMGetSubmatrices#

Gets the local submatrices (for this MPI rank only) for the PCGASM additive Schwarz preconditioner.

Synopsis#

#include "petscpc.h" 
PetscErrorCode PCGASMGetSubmatrices(PC pc, PetscInt *n, Mat *mat[])

Not Collective

Input Parameter#

  • pc - the preconditioner context

Output Parameters#

  • n - the number of matrices for this MPI rank (default value = 1)

  • mat - the matrices

Note#

Matrices returned by this routine have the same communicators as the index sets (IS) used to define subdomains in PCGASMSetSubdomains()

See Also#

KSP: Linear System Solvers, PCGASM, PCGASMSetOverlap(), PCGASMGetSubKSP(), PCGASMCreateSubdomains2D(), PCGASMSetSubdomains(), PCGASMGetSubdomains()

Level#

advanced

Location#

src/ksp/pc/impls/gasm/gasm.c

Index of all PC routines
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Index of all manual pages