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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>dimension command
	</H3>
	<P><B>Syntax:</B>
	</P>
	<PRE>dimension N
	</PRE>
	<UL><LI>N = 2 or 3
	</UL>
	<P><B>Examples:</B>
	</P>
	<PRE>dimension 2
	</PRE>
	<P><B>Description:</B>
	</P>
	<P>Set the dimensionality of the simulation. By default LAMMPS runs 3d
	simulations. To run a 2d simulation, this command should be used
	prior to setting up a simulation box via the
	<A HREF = "create_box.html">create_box</A> or <A HREF = "read_data.html">read_data</A> commands.
	Restart files also store this setting.
	</P>
	<P>See the discussion in <A HREF = "Section_howto.html">this section</A> for additional
	instructions on how to run 2d simulations.
	</P>
	<P><B>Restrictions:</B>
	</P>
	<P>This command must be used before the simulation box is defined by a
	<A HREF = "read_data.html">read_data</A> or <A HREF = "create_box.html">create_box</A> command.
	</P>
	<P><B>Related commands:</B>
	</P>
	<P><A HREF = "fix_enforce2d.html">fix enforce2d</A>
	</P>
	<P><B>Default:</B>
	</P>
	<PRE>dimension 3
	</PRE>
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