communicate.html
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communicate.html
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			<CENTER><A HREF = "http://lammps.sandia.gov">LAMMPS WWW Site</A> - <A HREF = "Manual.html">LAMMPS Documentation</A> - <A HREF = "Section_commands.html#comm">LAMMPS Commands</A>
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			<H3>communicate command
			</H3>
			<P><B>Syntax:</B>
			</P>
			<PRE>communicate style
			</PRE>
			<UL><LI>style = <I>single</I> or <I>multi</I>
			</UL>
			<P><B>Examples:</B>
			</P>
			<PRE>communicate multi
			</PRE>
			<P><B>Description:</B>
			</P>
			<P>This command sets the style of inter-processor communication that
			occurs each timestep as atom coordinates and other properties are
			exchanged between neighboring processors.
			</P>
			<P>The default style is <I>single</I> which means each processor acquires
			information for ghost atoms that are within a single distance from its
			sub-domain. The distance is the maximum of the neighbor cutoff for
			all atom type pairs.
			</P>
			<P>For many systems this is an efficient algorithm, but for systems with
			widely varying cutoffs for different type pairs, the <I>multi</I> style can
			be faster. In this case, each atom type is assigned its own distance
			cutoff for communication purposes, and fewer atoms will be
			communicated. See the <A HREF = "neighbor.html">neighbor multi</A> command for a
			neighbor list construction option that may also be beneficial for
			simulations of this kind.
			</P>
			<P><B>Restrictions:</B> none
			</P>
			<P><B>Related commands:</B>
			</P>
			<P><A HREF = "neighbor.html">neighbor</A>
			</P>
			<P><B>Default:</B>
			</P>
			<P>style = single
			</P>
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