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<section id="mlx-nn-gelu">
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<h1>mlx.nn.GELU<a class="headerlink" href="#mlx-nn-gelu" title="Permalink to this heading"></a></h1>
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<dl class="py class">
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<dt class="sig sig-object py" id="mlx.nn.GELU">
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<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">mlx.nn.</span></span><span class="sig-name descname"><span class="pre">GELU</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">approx</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">'none'</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#mlx.nn.GELU" title="Permalink to this definition"></a></dt>
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<dd><p>Applies the Gaussian Error Linear Units.</p>
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<div class="math notranslate nohighlight">
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\[\textrm{GELU}(x) = x * \Phi(x)\]</div>
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<p>where <span class="math notranslate nohighlight">\(\Phi(x)\)</span> is the Gaussian CDF.</p>
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<p>However, if <code class="docutils literal notranslate"><span class="pre">approx</span></code> is set to ‘precise’ or ‘fast’ it applies</p>
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<div class="math notranslate nohighlight">
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\[\begin{split}\textrm{GELUApprox}(x) &= x * \sigma\left(1.60033 * x \left(1 + 0.0433603 * x^2\right)\right) \\
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\textrm{GELUFast}(x) &= x * \sigma\left(1.773 * x\right)\end{split}\]</div>
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<p>respectively.</p>
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<p>See <a class="reference internal" href="../_autosummary_functions/mlx.nn.gelu.html#mlx.nn.gelu" title="mlx.nn.gelu"><code class="xref py py-func docutils literal notranslate"><span class="pre">gelu()</span></code></a>, <a class="reference internal" href="../_autosummary_functions/mlx.nn.gelu_approx.html#mlx.nn.gelu_approx" title="mlx.nn.gelu_approx"><code class="xref py py-func docutils literal notranslate"><span class="pre">gelu_approx()</span></code></a> and <a class="reference internal" href="../_autosummary_functions/mlx.nn.gelu_fast_approx.html#mlx.nn.gelu_fast_approx" title="mlx.nn.gelu_fast_approx"><code class="xref py py-func docutils literal notranslate"><span class="pre">gelu_fast_approx()</span></code></a> for the
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functional equivalents and information regarding error bounds.</p>
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<dl class="field-list simple">
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<dt class="field-odd">Parameters<span class="colon">:</span></dt>
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<dd class="field-odd"><p><strong>approx</strong> (<em>'none'</em><em> | </em><em>'precise'</em><em> | </em><em>'fast'</em>) – Which approximation to gelu to use if any.</p>
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