Creates a basic application ordering using two index sets.
PetscErrorCode AOCreateBasicIS(IS isapp,IS ispetsc,AO *aoout)
Collective on IS
|isapp ||- index set that defines an ordering
|ispetsc ||- index set that defines another ordering (may be NULL to use the
|aoout ||- the new application ordering
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"
Index of all AO routines
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