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<TITLE>MATNEST</TITLE>
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<div id="version" align=right><b>petsc-3.7.5 2017-01-01</b></div>
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<A NAME="MATNEST"><H1>MATNEST</H1></A>
<A HREF="../Mat/MATNEST.html#MATNEST">MATNEST</A> = "nest" - Matrix type consisting of nested submatrices, each stored separately.
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
This matrix type permits scalable use of PCFieldSplit and avoids the large memory costs of extracting submatrices.
It allows the use of symmetric and block formats for parts of multi-physics simulations.
It is usually used with DMComposite and <A HREF="../DM/DMCreateMatrix.html#DMCreateMatrix">DMCreateMatrix</A>()
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<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Mat/MatCreate.html#MatCreate">MatCreate</A>(), <A HREF="../Mat/MatType.html#MatType">MatType</A>, <A HREF="../Mat/MatCreateNest.html#MatCreateNest">MatCreateNest</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/mat/impls/nest/matnest.c.html#MATNEST">src/mat/impls/nest/matnest.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/snes/examples/tutorials/ex28.c.html">src/snes/examples/tutorials/ex28.c.html</A><BR>
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