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<A NAME="PETSC_COMM_WORLD"><H1>PETSC_COMM_WORLD</H1></A>
a duplicate of the MPI_COMM_WORLD communicator which represents all the processs
<P>
Notes: <A HREF="../Sys/PETSC_COMM_WORLD.html#PETSC_COMM_WORLD">PETSC_COMM_WORLD</A> and MPI_COMM_WORLD are equivalent except that passing MPI_COMM_WORLD
into PETSc object constructors will result in using more MPI resources since an MPI_Comm_dup()
will be done on it internally. We recommend always using <A HREF="../Sys/PETSC_COMM_WORLD.html#PETSC_COMM_WORLD">PETSC_COMM_WORLD</A>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Sys/PETSC_COMM_SELF.html#PETSC_COMM_SELF">PETSC_COMM_SELF</A>
<BR>
<P>
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>beginner
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../include/petsc.h.html#PETSC_COMM_WORLD">include/petsc.h</A>
<BR><A HREF="./index.html">Index of all Sys routines</A>
<BR><A HREF="../../index.html">Table of Contents for all manual pages</A>
<BR><A HREF="../singleindex.html">Index of all manual pages</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/sys/examples/tutorials/ex1.c.html">src/sys/examples/tutorials/ex1.c.html</A><BR>
<A HREF="../../../src/sys/examples/tutorials/ex2.c.html">src/sys/examples/tutorials/ex2.c.html</A><BR>
<A HREF="../../../src/sys/examples/tutorials/ex4.c.html">src/sys/examples/tutorials/ex4.c.html</A><BR>
<A HREF="../../../src/vec/is/examples/tutorials/ex1.c.html">src/vec/is/examples/tutorials/ex1.c.html</A><BR>
<A HREF="../../../src/vec/is/examples/tutorials/ex2.c.html">src/vec/is/examples/tutorials/ex2.c.html</A><BR>
<A HREF="../../../src/vec/is/examples/tutorials/ex4.c.html">src/vec/is/examples/tutorials/ex4.c.html</A><BR>
<A HREF="../../../src/vec/is/examples/tutorials/ex1f.F.html">src/vec/is/examples/tutorials/ex1f.F.html</A><BR>
<A HREF="../../../src/vec/is/examples/tutorials/ex1f90.F.html">src/vec/is/examples/tutorials/ex1f90.F.html</A><BR>
<A HREF="../../../src/vec/examples/tutorials/ex1.c.html">src/vec/examples/tutorials/ex1.c.html</A><BR>
<A HREF="../../../src/vec/examples/tutorials/ex1e.c.html">src/vec/examples/tutorials/ex1e.c.html</A><BR>
<A HREF="../../../src/vec/examples/tutorials/ex2.c.html">src/vec/examples/tutorials/ex2.c.html</A><BR>
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