dihedral_style_harmonic.html
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dihedral_style_harmonic.html
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			<H3>dihedral_style harmonic command
			</H3>
			<P><B>Syntax:</B>
			</P>
			<PRE>dihedral_style harmonic
			</PRE>
			<P><B>Examples:</B>
			</P>
			<PRE>dihedral_style harmonic
			dihedral_coeff 1 80.0 1 2
			</PRE>
			<P><B>Description:</B>
			</P>
			<P>The <I>harmonic</I> dihedral style uses the potential
			</P>
			<CENTER><IMG SRC = "Eqs/dihedral_harmonic.jpg">
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			<P>The following coefficients must be defined for each dihedral type via the
			<A HREF = "dihedral_coeff.html">dihedral_coeff</A> command as in the example above, or in
			the data file or restart files read by the <A HREF = "read_data.html">read_data</A>
			or <A HREF = "read_restart.html">read_restart</A> commands:
			</P>
			<UL><LI>K (energy)
			<LI>d (+1 or -1)
			<LI>n (integer >= 0)
			</UL>
			<P><B>Restrictions:</B>
			</P>
			<P>Dihedral styles can only be set for atom styles that allow dihedrals to be
			defined.
			</P>
			<P>This dihedral style is part of the "molecular" package. It is only
			enabled if LAMMPS was built with that package. See the <A HREF = "Section_start.html#2_2">Making
			LAMMPS</A> section for more info.
			</P>
			<P><B>Related commands:</B>
			</P>
			<P><A HREF = "dihedral_coeff.html">dihedral_coeff</A>
			</P>
			<P><B>Default:</B> none
			</P>
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