<math xmlns="http://www.w3.org/1998/Math/MathML" id="p1.1.m1.1" class="ltx_Math" alttext="{\displaystyle t\equiv{\mathrm{true}}}" display="inline">
  <semantics id="p1.1.m1.1a">
    <mrow id="p1.1.m1.1.7" xref="p1.1.m1.1.7.cmml">
      <mi id="p1.1.m1.1.1" xref="p1.1.m1.1.1.cmml">t</mi>
      <mo id="p1.1.m1.1.2" xref="p1.1.m1.1.2.cmml">≡</mo>
      <mi id="p1.1.m1.1.6" xref="p1.1.m1.1.6.cmml">true</mi>
    </mrow>
    <annotation-xml encoding="MathML-Content" id="p1.1.m1.1b">
      <apply id="p1.1.m1.1.7.cmml" xref="p1.1.m1.1.7">
        <equivalent id="p1.1.m1.1.2.cmml" xref="p1.1.m1.1.2"/>
        <ci id="p1.1.m1.1.1.cmml" xref="p1.1.m1.1.1">𝑡</ci>
        <ci id="p1.1.m1.1.6.cmml" xref="p1.1.m1.1.6">true</ci>
      </apply>
    </annotation-xml>
    <annotation encoding="application/x-tex" id="p1.1.m1.1c">{\displaystyle t\equiv{\mathrm{true}}}</annotation>
  </semantics>
</math>

<math xmlns="http://www.w3.org/1998/Math/MathML" display="block" alttext="{\displaystyle t\equiv \mathrm {true} }">
  <semantics>
    <mrow class="MJX-TeXAtom-ORD">
      <mstyle displaystyle="true" scriptlevel="0">
        <mi>t</mi>
        <mo>&#x2261;<!-- ≡ --></mo>
        <mrow class="MJX-TeXAtom-ORD">
          <mi mathvariant="normal">t</mi>
          <mi mathvariant="normal">r</mi>
          <mi mathvariant="normal">u</mi>
          <mi mathvariant="normal">e</mi>
        </mrow>
      </mstyle>
    </mrow>
    <annotation encoding="application/x-tex">{\displaystyle t\equiv \mathrm {true} }</annotation>
  </semantics>
</math>