ag-gipp/GoUldI

<math 
  xmlns='http://www.w3.org/1998/Math/MathML'>
  <semantics>
    <msub>
      <mi>&#8520;</mi>
      <mi>c</mi>
    </msub>
    <annotation-xml encoding='MathML-Content'>
      <apply>
        <ci>Subscript</ci>
        <imaginaryi />
        <ci>c</ci>
      </apply>
    </annotation-xml>
  </semantics>
</math>