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<li class="toctree-l2"><a class="reference internal" href="improper_amoeba.html">improper_style amoeba command</a></li>
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<li class="toctree-l2"><a class="reference internal" href="improper_class2.html">improper_style class2 command</a></li>
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<li class="toctree-l2"><a class="reference internal" href="improper_harmonic.html">improper_style harmonic command</a></li>
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<li class="toctree-l2"><a class="reference internal" href="improper_hybrid.html">improper_style hybrid command</a></li>
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<li class="toctree-l2"><a class="reference internal" href="improper_inversion_harmonic.html">improper_style inversion/harmonic command</a></li>
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<li class="toctree-l2"><a class="reference internal" href="improper_none.html">improper_style none command</a></li>
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<li class="toctree-l2"><a class="reference internal" href="improper_ring.html">improper_style ring command</a></li>
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<li class="toctree-l2"><a class="reference internal" href="improper_sqdistharm.html">improper_style sqdistharm command</a></li>
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<li class="toctree-l2"><a class="reference internal" href="improper_umbrella.html">improper_style umbrella command</a></li>
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<p><span class="math notranslate nohighlight">\(\renewcommand{\AA}{\text{Å}}\)</span></p>
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<section id="improper-style-zero-command">
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<span id="index-0"></span><h1>improper_style zero command<a class="headerlink" href="#improper-style-zero-command" title="Link to this heading"></a></h1>
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<section id="syntax">
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<h2>Syntax<a class="headerlink" href="#syntax" title="Link to this heading"></a></h2>
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<div class="highlight-LAMMPS notranslate"><div class="highlight"><pre><span></span><span class="k">improper_style</span><span class="w"> </span><span class="n">zero</span><span class="w"> </span><span class="n">[nocoeff]</span>
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</pre></div>
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</section>
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<section id="examples">
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<h2>Examples<a class="headerlink" href="#examples" title="Link to this heading"></a></h2>
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<div class="highlight-LAMMPS notranslate"><div class="highlight"><pre><span></span><span class="k">improper_style</span><span class="w"> </span><span class="n">zero</span>
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<span class="k">improper_style</span><span class="w"> </span><span class="n">zero</span><span class="w"> </span><span class="n">nocoeff</span>
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<span class="k">improper_coeff</span><span class="w"> </span><span class="o">*</span>
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</pre></div>
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</section>
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<section id="description">
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<h2>Description<a class="headerlink" href="#description" title="Link to this heading"></a></h2>
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<p>Using an improper style of zero means improper forces and energies are
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not computed, but the geometry of improper quadruplets is still
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accessible to other commands.</p>
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<p>As an example, the <a class="reference internal" href="compute_improper_local.html"><span class="doc">compute improper/local</span></a> command can be used to
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compute the chi values for the list of quadruplets of improper atoms
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listed in the data file read by the <a class="reference internal" href="read_data.html"><span class="doc">read_data</span></a>
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command. If no improper style is defined, this command cannot be
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used.</p>
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<p>The optional <em>nocoeff</em> flag allows to read data files with a ImproperCoeff
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section for any improper style. Similarly, any improper_coeff commands
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will only be checked for the improper type number and the rest ignored.</p>
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<p>Note that the <a class="reference internal" href="improper_coeff.html"><span class="doc">improper_coeff</span></a> command must be
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used for all improper types, though no additional values are
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specified.</p>
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</section>
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<section id="restrictions">
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<h2>Restrictions<a class="headerlink" href="#restrictions" title="Link to this heading"></a></h2>
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<blockquote>
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<div><p>none</p>
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</div></blockquote>
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</section>
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<section id="related-commands">
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<h2>Related commands<a class="headerlink" href="#related-commands" title="Link to this heading"></a></h2>
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<p>none</p>
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<p><a class="reference internal" href="improper_none.html"><span class="doc">improper_style none</span></a></p>
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</section>
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<section id="default">
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<h2>Default<a class="headerlink" href="#default" title="Link to this heading"></a></h2>
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<p>none</p>
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