MPI_Group_union(3)

NAME
     MPI_Group_union - Produces a group by combining two groups

SYNOPSIS
     C:

          #include <mpi.h>

          int MPI_Group_union ( group1, group2, group_out )
          MPI_Group group1, group2, *group_out


     C++:

          #include <mpi.h>

          static Group Group::Union(
          const Group&      group1,
          const Group&      group2)


     Fortran:

          INCLUDE "mpif.h" (or USE MPI)

          INTEGER group1, group2, newgroup, ierror

          CALL MPI_GROUP_UNION(group1, group2, newgroup, ierror)


STANDARDS
     This release implements the MPI 1.2 standard, as documented by the MPI
     Forum in the spring 1997 release of MPI:  A Message Passing Interface
     Standard.

DESCRIPTION
     The MPI_Group_union routine produces a group by combining two groups.
     This routine accepts the following parameters:

     group1    Specifies the first group (handle)

     group2    Specifies the second group (handle)

     group_out Returns the union group (handle)

     ierror    Specifies the return code value for successful completion,
               which is in MPI_SUCCESS.  MPI_SUCCESS is defined in the mpif.h
               file.