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      <mo id="p1.1.m1.1.1" xref="p1.1.m1.1.1.cmml">∂</mo>
      <mo id="p1.1.m1.1.3a" xref="p1.1.m1.1.3.cmml">⁡</mo>
      <mi id="p1.1.m1.1.2" xref="p1.1.m1.1.2.cmml">F</mi>
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    <annotation-xml encoding="MathML-Content" id="p1.1.m1.1b">
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    <annotation encoding="application/x-tex" id="p1.1.m1.1c">{\displaystyle{\displaystyle\partial F}}</annotation>
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<math class="mwe-math-element" xmlns="http://www.w3.org/1998/Math/MathML"><mrow data-mjx-texclass="ORD"><mstyle displaystyle="true" scriptlevel="0"><mi>&#x2202;</mi><mi>F</mi></mstyle></mrow></math>