petsc-3.13.6 2020-09-29
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AOCreateMappingIS

 Creates a basic Section 1.5 Writing Application Codes with PETSc ordering using two index sets.

Synopsis

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

Input Parameters

comm - MPI communicator that is to share AO
isapp - index set that defines an ordering
ispetsc - index set that defines another ordering, maybe NULL for identity IS

Output Parameter

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

Options Database Key

-ao_view : call AOView() at the conclusion of AOCreateMappingIS() -

Notes

the index sets isapp and ispetsc need NOT contain the all the integers 0 to N-1, that is there CAN be "holes" in the indices. Use AOCreateBasic() or AOCreateBasicIS() if they do not have holes for better performance.

See Also

AOCreateBasic(), AOCreateMapping(), AODestroy()

Level

beginner

Location

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