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    <h2>public pure elemental function incomplete_gamma_lower(a, x) result(rst)  
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    <p>Computes the lower incomplete gamma function.</p>
<p>The lower incomplete gamma function is defined as:
<script type="math/tex; mode=display"> \gamma(a, x) = \int_{0}^{x} t^{a-1} e^{-t} \,dt </script>
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<p>See Also</p>
<ul>
<li><a href="https://e