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<A NAME="MGType"><H1>MGType</H1></A>
Determines the type of multigrid method that is run.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
typedef enum { MGMULTIPLICATIVE,MGADDITIVE,MGFULL,MGKASKADE } MGType;
</PRE>
<P>
<H3><FONT COLOR="#CC3333">Values</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>MGMULTIPLICATIVE (default) </B></TD><TD>- traditional V or W cycle as determined by <A HREF="../PC/MGSetCycles.html#MGSetCycles">MGSetCycles</A>()
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>MGADDITIVE </B></TD><TD>- the additive multigrid preconditioner where all levels are
smoothed before updating the residual
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>MGFULL </B></TD><TD>- same as multiplicative except one also performs grid sequencing,
that is starts on the coarsest grid, performs a cycle, interpolates
to the next, performs a cycle etc
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>MGKASKADE </B></TD><TD>- like full multigrid except one never goes back to a coarser level
from a finer
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../PC/MGSetType.html#MGSetType">MGSetType</A>()
<BR>
<P>
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>beginner
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/ksp/pc/impls/mg/../../../../../include/petscmg.h.html#MGType">src/ksp/pc/impls/mg/../../../../../include/petscmg.h</A>
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