petsc-3.13.6 2020-09-29
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AOCreateBasic

 Creates a basic Section 1.5 Writing Application Codes with PETSc ordering using two integer arrays.

Synopsis

#include "petscao.h"   
PetscErrorCode  AOCreateBasic(MPI_Comm comm,PetscInt napp,const PetscInt myapp[],const PetscInt mypetsc[],AO *aoout)
Collective

Input Parameters

comm - MPI communicator that is to share AO
napp - size of integer arrays
myapp - integer array that defines an ordering
mypetsc - integer array that defines another ordering (may be NULL to indicate the natural ordering, that is 0,1,2,3,...)

Output Parameter

aoout -the new Section 1.5 Writing Application Codes with PETSc ordering

Notes

the arrays myapp and mypetsc must contain the all the integers 0 to napp-1 with no duplicates; that is there cannot be any "holes" in the indices. Use AOCreateMapping() or AOCreateMappingIS() if you wish to have "holes" in the indices.

See Also

AOCreateBasicIS(), AODestroy(), AOPetscToApplication(), AOApplicationToPetsc()

Level

beginner

Location

src/vec/is/ao/impls/basic/aobasic.c
Index of all AO routines
Table of Contents for all manual pages
Index of all manual pages