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# MPI_Comm

the basic object used by MPI to determine which processes are involved in a communication

## Note

This manual page is a place-holder because MPICH does not have a manual page for `MPI_Comm`

## See Also

`PETSC_COMM_WORLD`, `PETSC_COMM_SELF`

## Level

beginner

## Location

include/petscsys.h

## Examples

src/dm/impls/plex/tutorials/ex5.c
src/dm/impls/plex/tutorials/ex19.c
src/dm/tutorials/ex25.c
src/dm/impls/plex/tutorials/ex11.c
src/dm/tutorials/ex22.c
src/dm/impls/plex/tutorials/ex15.c
src/dm/impls/plex/tutorials/ex16.c
src/dm/field/tutorials/ex1.c
src/dm/impls/plex/tutorials/ex18.c
src/dm/impls/stag/tutorials/ex4.c

Index of all Sys routines
Table of Contents for all manual pages
Index of all manual pages