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<div id="version" align=right><b>petsc-3.4.2 2013-07-02</b></div>
<A NAME="PetscSF"><H1>PetscSF</H1></A>
PETSc object for setting up and managing the communication of certain entries of arrays and <A HREF="../Vec/Vecs.html#Vecs">Vecs</A> between MPI processes.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
typedef struct _p_PetscSF* PetscSF;
</PRE>
<P>
<P>
<A HREF="../PetscSF/PetscSF.html#PetscSF">PetscSF</A> uses the concept of star forests to indicate and determine the communication patterns concisely and efficiently.
A star http://en.wikipedia.org/wiki/Star_(graph_theory) forest is simply a collection of trees of height 1. The leave nodes represent
"ghost locations" for the root nodes.
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../PetscSF/PetscSFCreate.html#PetscSFCreate">PetscSFCreate</A>(), <A HREF="../Vec/VecScatter.html#VecScatter">VecScatter</A>, <A HREF="../Vec/VecScatterCreate.html#VecScatterCreate">VecScatterCreate</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/vec/is/sf/../../../../include/petscsftypes.h.html#PetscSF">src/vec/is/sf/../../../../include/petscsftypes.h</A>
<BR><A HREF="./index.html">Index of all PetscSF 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/vec/is/sf/examples/tutorials/ex1.c.html">src/vec/is/sf/examples/tutorials/ex1.c.html</A><BR>
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