PETSc version 3.16.5
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# AOCreateBasicIS

Creates a basic application ordering using two index sets.

### Synopsis

    #include "petscao.h"
    PetscErrorCode AOCreateBasicIS(IS isapp,IS ispetsc,AO *aoout)

Collective on IS

### Input Parameters

| isapp | - index set that defines an ordering
| ispetsc | - index set that defines another ordering (may be NULL to use the natural ordering)

### Output Parameter

| aoout | - the new application ordering

### Notes

the index sets isapp and ispetsc must contain the all the integers 0 to napp-1 (where napp is the length of the index sets) with no duplicates; that is there cannot be any "holes"

### See Also

AOCreateBasic(), AODestroy()

### Level

beginner

### Location

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