ag-gipp/GoUldI

<math 
  xmlns='http://www.w3.org/1998/Math/MathML'>
  <semantics>
    <mrow>
      <mrow>
        <mi>f</mi>
        <mo>:</mo>
        <msub>
          <mi>N</mi>
          <mn>1</mn>
        </msub>
      </mrow>
      <semantics>
        <mo>&#8594;</mo>
        <annotation encoding='Mathematica'>&quot;\[Rule]&quot;</annotation>
      </semantics>
      <msub>
        <mi>N</mi>
        <mn>1</mn>
      </msub>
    </mrow>
    <annotation-xml encoding='MathML-Content'>
      <apply>
        <ci>Rule</ci>
        <apply>
          <ci>Pattern</ci>
          <ci>f</ci>
          <apply>
            <ci>Subscript</ci>
            <ci>N</ci>
            <cn type='integer'>1</cn>
          </apply>
        </apply>
        <apply>
          <ci>Subscript</ci>
          <ci>N</ci>
          <cn type='integer'>1</cn>
        </apply>
      </apply>
    </annotation-xml>
  </semantics>
</math>