PCASMCreateSubdomains

Creates the index sets for the overlapping Schwarz preconditioner, PCASM, for any problem on a general grid.

Synopsis

#include "petscpc.h" 
PetscErrorCode PCASMCreateSubdomains(Mat A, PetscInt n, IS *outis[])

Collective

Input Parameters

• A - The global matrix operator

• n - the number of local blocks

Output Parameter

• outis - the array of index sets defining the subdomains

Note

This generates nonoverlapping subdomains; the PCASM will generate the overlap from these if you use PCASMSetLocalSubdomains()

Fortran Note

You must provide the array outis[] already allocated of length n.

See Also

PCASM, PCASMSetLocalSubdomains(), PCASMDestroySubdomains()

Level

advanced

Location

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

Examples

src/ksp/ksp/tutorials/ex19.c

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