arangodb/3rdParty/boost/1.62.0/libs/math/doc/equations/lgamm1.mml

 	<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
  <mrow>
    <mtext>lgamma</mtext>
    <mfenced>
      <mrow>
        <mi>z</mi>
      </mrow>
    </mfenced>
    <mo>=</mo>
    <mi>ln</mi>
    <mo>|</mo>
    <mi>&#x0393;</mi>
    <mfenced>
      <mrow>
        <mi>z</mi>
      </mrow>
    </mfenced>
    <mo>|</mo>
  </mrow>
</math>