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<div class="section" id="angle-style-fourier-command">
<span id="index-0"></span><h1>angle_style fourier command<a class="headerlink" href="#angle-style-fourier-command" title="Permalink to this headline"></a></h1>
</div>
<div class="section" id="angle-style-fourier-omp-command">
<h1>angle_style fourier/omp command<a class="headerlink" href="#angle-style-fourier-omp-command" title="Permalink to this headline"></a></h1>
<div class="section" id="syntax">
<h2>Syntax<a class="headerlink" href="#syntax" title="Permalink to this headline"></a></h2>
<div class="highlight-python"><div class="highlight"><pre>angle_style fourier
</pre></div>
</div>
</div>
<div class="section" id="examples">
<h2>Examples<a class="headerlink" href="#examples" title="Permalink to this headline"></a></h2>
<p>angle_style fourier
angle_coeff 75.0 1.0 1.0 1.0</p>
</div>
<div class="section" id="description">
<h2>Description<a class="headerlink" href="#description" title="Permalink to this headline"></a></h2>
<p>The <em>fourier</em> angle style uses the potential</p>
<img alt="_images/angle_fourier.jpg" class="align-center" src="_images/angle_fourier.jpg" />
<p>The following coefficients must be defined for each angle type via the
<a class="reference internal" href="angle_coeff.html"><em>angle_coeff</em></a> command as in the example above, or in
the data file or restart files read by the <a class="reference internal" href="read_data.html"><em>read_data</em></a>
or <a class="reference internal" href="read_restart.html"><em>read_restart</em></a> commands:</p>
<ul class="simple">
<li>K (energy)</li>
<li>C0 (real)</li>
<li>C1 (real)</li>
<li>C2 (real)</li>
</ul>
<hr class="docutils" />
<p>Styles with a <em>cuda</em>, <em>gpu</em>, <em>intel</em>, <em>kk</em>, <em>omp</em>, or <em>opt</em> suffix are
functionally the same as the corresponding style without the suffix.
They have been optimized to run faster, depending on your available
hardware, as discussed in <a class="reference internal" href="Section_accelerate.html"><em>Section_accelerate</em></a>
of the manual. The accelerated styles take the same arguments and
should produce the same results, except for round-off and precision
issues.</p>
<p>These accelerated styles are part of the USER-CUDA, GPU, USER-INTEL,
KOKKOS, USER-OMP and OPT packages, respectively. They are only
enabled if LAMMPS was built with those packages. See the <a class="reference internal" href="Section_start.html#start-3"><span>Making LAMMPS</span></a> section for more info.</p>
<p>You can specify the accelerated styles explicitly in your input script
by including their suffix, or you can use the <a class="reference internal" href="Section_start.html#start-7"><span>-suffix command-line switch</span></a> when you invoke LAMMPS, or you can
use the <a class="reference internal" href="suffix.html"><em>suffix</em></a> command in your input script.</p>
<p>See <a class="reference internal" href="Section_accelerate.html"><em>Section_accelerate</em></a> of the manual for
more instructions on how to use the accelerated styles effectively.</p>
</div>
<hr class="docutils" />
<div class="section" id="restrictions">
<h2>Restrictions<a class="headerlink" href="#restrictions" title="Permalink to this headline"></a></h2>
<p>This angle style can only be used if LAMMPS was built with the
USER_MISC package. See the <a class="reference internal" href="Section_start.html#start-3"><span>Making LAMMPS</span></a>
section for more info on packages.</p>
</div>
<div class="section" id="related-commands">
<h2>Related commands<a class="headerlink" href="#related-commands" title="Permalink to this headline"></a></h2>
<p><a class="reference internal" href="angle_coeff.html"><em>angle_coeff</em></a></p>
<p><strong>Default:</strong> none</p>
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