#include "petscao.h" PetscErrorCode AOApplicationToPetscIS(AO ao,IS is)Collective on AO
|ao||- the Section 1.5 Writing Application Codes with PETSc ordering context|
|is||- the index set; this is replaced with its mapped values|
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.