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<div id="version" align=right><b>petsc-3.4.2 2013-07-02</b></div>
<A NAME="MATAIJ"><H1>MATAIJ</H1></A>
<A HREF="../Mat/MATAIJ.html#MATAIJ">MATAIJ</A> = "aij" - A matrix type to be used for sparse matrices. This matrix type is identical to <A HREF="../Mat/MATSEQAIJ.html#MATSEQAIJ">MATSEQAIJ</A> when constructed with a single process communicator,
and <A HREF="../Mat/MATMPIAIJ.html#MATMPIAIJ">MATMPIAIJ</A> otherwise. As a result, for single process communicators,
<A HREF="../Mat/MatSeqAIJSetPreallocation.html#MatSeqAIJSetPreallocation">MatSeqAIJSetPreallocation</A> is supported, and similarly <A HREF="../Mat/MatMPIAIJSetPreallocation.html#MatMPIAIJSetPreallocation">MatMPIAIJSetPreallocation</A> is supported
for communicators controlling multiple processes. It is recommended that you call both of
the above preallocation routines for simplicity.
<P>
<H3><FONT COLOR="#CC3333">Options Database Keys</FONT></H3>
<DT><B>-mat_type aij </B> -sets the matrix type to "aij" during a call to <A HREF="../Mat/MatSetFromOptions.html#MatSetFromOptions">MatSetFromOptions</A>()
<br>
<P>
Developer Notes: Subclasses include <A HREF="../Mat/MATAIJCUSP.html#MATAIJCUSP">MATAIJCUSP</A>, <A HREF="../Mat/MATAIJCUSPARSE.html#MATAIJCUSPARSE">MATAIJCUSPARSE</A>, <A HREF="../Mat/MATAIJPERM.html#MATAIJPERM">MATAIJPERM</A>, <A HREF="../Mat/MATAIJCRL.html#MATAIJCRL">MATAIJCRL</A>, and also automatically switches over to use inodes when
enough exist.
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Mat/MatCreateAIJ.html#MatCreateAIJ">MatCreateAIJ</A>(), <A HREF="../Mat/MatCreateSeqAIJ.html#MatCreateSeqAIJ">MatCreateSeqAIJ</A>(), <A HREF="../Mat/MATSEQAIJ.html#MATSEQAIJ">MATSEQAIJ</A>,<A HREF="../Mat/MATMPIAIJ.html#MATMPIAIJ">MATMPIAIJ</A>
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>beginner
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/mat/impls/aij/mpi/mpiaij.c.html#MATAIJ">src/mat/impls/aij/mpi/mpiaij.c</A>
<BR><A HREF="./index.html">Index of all Mat 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/mat/examples/tutorials/ex8.c.html">src/mat/examples/tutorials/ex8.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex4.c.html">src/ksp/ksp/examples/tutorials/ex4.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex31.c.html">src/ksp/ksp/examples/tutorials/ex31.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex42.c.html">src/ksp/ksp/examples/tutorials/ex42.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex43.c.html">src/ksp/ksp/examples/tutorials/ex43.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex46.c.html">src/ksp/ksp/examples/tutorials/ex46.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex49.c.html">src/ksp/ksp/examples/tutorials/ex49.c.html</A><BR>
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<A HREF="../../../src/ksp/ksp/examples/tutorials/ex56.c.html">src/ksp/ksp/examples/tutorials/ex56.c.html</A><BR>
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