petsc-3.7.7 2017-09-25
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PCGASMGetSubmatrices

 Gets the local submatrices (for this processor only) for the 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 processor (default value = 1)
mat - the matrices

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

Keywords

PC, GASM, set, local, subdomains, additive Schwarz, block Jacobi

See Also

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