petsc-3.7.3 2016-08-01

AOApplicationToPetscIS

Maps an index set in the application-defined ordering to the PETSc ordering.

Synopsis

#include "petscao.h" 
PetscErrorCode  AOApplicationToPetscIS(AO ao,IS is)

Collective on AO and IS

Input Parameters

	ao	- the application ordering context
	is	- the index set; this is replaced with its mapped values

Output Parameter

is -the mapped index set

Note

The index set cannot be of type stride or block

Any integers in ia[] that are negative are left unchanged. This allows one to convert, for example, neighbor lists that use negative entries to indicate nonexistent neighbors due to boundary conditions, etc.

Keywords