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<A NAME="PCRAMG"><H1>PCRAMG</H1></A>
Interface to the algebraic multigrid preconditioner amg1r5 is the algebraic multigrid code by John Ruge and Klaus
Stueben [1,2].
[1] K. St\"{u}ben,"Algebraic Multigrid: An Introduction for Positive
Definite Problems with Applications", Tech. Rep. 53, German
National Research Center for Information Technology (GMD),
Schloss Birlinhoven, D-53754 Sankt-Augustin, Germany, March 1999
[2] J. Ruge and K. St\"{u}ben, "Algebraic Multigrid" in "Multigrid
Methods" S. McCormick, Ed., vol. 3 of Frontiers in Applied
Mathmatics, pp. 73--130, SIAM, Philadelphia, PA, 1987
<P>
<H3><FONT COLOR="#CC3333">Options Database Keys</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-pc_ramg_iswtch </B></TD><TD>-
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-pc_ramg_iout </B></TD><TD>-
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-pc_ramg_cycles </B></TD><TD>-
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-pc_ramg_madapt </B></TD><TD>-
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-pc_ramg_nsolc </B></TD><TD>-
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-pc_ramg_eps </B></TD><TD>-
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-pc_ramg_nwt </B></TD><TD>-
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-pc_ramg_ntr </B></TD><TD>-
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-pc_ramg_ecg1 </B></TD><TD>-
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-pc_ramg_ecg2 </B></TD><TD>-
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-pc_ramg_ewt2 </B></TD><TD>-
</TD></TR></TABLE>
See the amg1r5 documentation for the meaning of these parameters.
<P>
<P>
<P>
Notes: Only implemented for some matrix formats. Not implemented in parallel
<P>
Requires symmetric, positive definite matrices
<P>
AMG1r5 is no longer easily available, see http://www.mgnet.org/mgnet-codes-gmd.html
It has been replaced by Klaus Stueben's SAMG (represent in PETSc by <A HREF="../PC/PCRAMG.html#PCRAMG">PCRAMG</A>).
<P>
Contributed by Domenico Lahaye
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../PC/PCCreate.html#PCCreate">PCCreate</A>(), <A HREF="../PC/PCSetType.html#PCSetType">PCSetType</A>(), <A HREF="../PC/PCType.html#PCType">PCType</A> (for list of available types), <A HREF="../PC/PC.html#PC">PC</A>, <A HREF="../PC/PCSAMG.html#PCSAMG">PCSAMG</A>
<BR>
<P>
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/ksp/pc/impls/ramg/ramgpetsc.c.html#PCRAMG">src/ksp/pc/impls/ramg/ramgpetsc.c</A>
<BR><A HREF="./index.html">Index of all PC routines</A>
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