PCASMGetLocalSubmatrices#

Gets the local submatrices (for this processor only) for the additive Schwarz preconditioner, PCASM.

Synopsis#

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

Not Collective

Input Parameter#

  • pc - the preconditioner context

Output Parameters#

  • n - if requested, the number of matrices for this processor (default value = 1)

  • mat - if requested, the matrices

Notes#

Call after PCSetUp() (or KSPSetUp()) but before PCApply() and before PCSetUpOnBlocks())

Usually one would use PCSetModifySubMatrices() to change the submatrices in building the preconditioner.

Fortran Note#

Pass in for mat an array long enough to hold all the matrices

See Also#

KSP: Linear System Solvers, PCASM, PCASMSetTotalSubdomains(), PCASMSetOverlap(), PCASMGetSubKSP(), PCASMCreateSubdomains2D(), PCASMSetLocalSubdomains(), PCASMGetLocalSubdomains(), PCSetModifySubMatrices()

Level#

advanced

Location#

src/ksp/pc/impls/asm/asm.c


Index of all PC routines
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Index of all manual pages