ag-gipp/GoUldI

<math 
  xmlns="http://www.w3.org/1998/Math/MathML">
  <semantics>
    <mstyle displaystyle="true">
      <mn>1</mn>
      <mo>-</mo>
      <mi>a</mi>
      <mspace width="thinmathspace"/>
      <msub>
        <mover>
          <mo>∂</mo>
          <mo stretchy="false">¯</mo>
        </mover>
        <mi>p</mi>
      </msub>
    </mstyle>
    <annotation encoding="TeX">\displaystyle 1-a\,\bar{\partial}_{p}</annotation>
  </semantics>
</math>