<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
  <semantics>
    <mo>&NotLess;</mo>
    <annotation-xml encoding="MathML-Content">
      <apply>
        <not/>
        <lt/>
      </apply>
    </annotation-xml>
    <annotation encoding="SnuggleTeX">\[ \not&lt; \]</annotation>
    <annotation encoding="LaTeX">\[ \not&lt; \]</annotation>
    <annotation encoding="Maxima">operator("not&lt;")</annotation>
  </semantics>
</math>

<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
  <semantics>
    <mo>&NotLess;</mo>
    <annotation encoding="SnuggleTeX">\[ \not&lt; \]</annotation>
  </semantics>
</math>

<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
  <mo>&NotLess;</mo>
</math>

<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
  <apply>
    <not/>
    <lt/>
  </apply>
</math>

operator("not<")