ag-gipp/GoUldI

<math 
  xmlns="http://www.w3.org/1998/Math/MathML">
  <semantics>
    <merror>
      <mtext>Parse error on line 1:
\((f * g )(t) &amp; \, \stackrel{\math
--------------^
</mtext>
    </merror>
    <annotation encoding="TeX">(f * g )(t) &amp; \, \stackrel{\mathrm{def}}{=}\ \int_{-\infty}^\infty f(\tau) g(t - \tau) \, d\tau</annotation>
  </semantics>
</math>