petsc-3.14.5 2021-03-03
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# ISLocalToGlobalMappingCreateIS

Creates a mapping between a local (0 to n) ordering and a global parallel ordering.

### Synopsis

    #include "petscis.h"
    PetscErrorCode  ISLocalToGlobalMappingCreateIS(IS is,ISLocalToGlobalMapping *mapping)

Not collective

### Input Parameter

| is | - index set containing the global numbers for each local number

### Output Parameter

| mapping | - new mapping data structure

### Notes

the block size of the IS determines the block size of the mapping

### See Also

ISLocalToGlobalMappingDestroy(), ISLocalToGlobalMappingCreate(), ISLocalToGlobalMappingSetFromOptions()

### Level

advanced

### Location

src/vec/is/utils/isltog.c
Index of all IS routines
Table of Contents for all manual pages
Index of all manual pages