ag-gipp/GoUldI

Integrate::nodiffd: 
      ∞     ∞          (U)
   ∫     ∫     exp(i Φ   (s, t ; x)) dsdt
      -∞    -∞
     cannot be interpreted. Integrals are entered in the form ∫ f  x
          b
     , ∫  f  x, or       ∫       f, where  is entered as dd.
          a             vars ∈ region

ToExpression::esntx: 
   Could not parse \Psi^{(\mathrm{U})}\left(\mathbf{x}\right)=\int_{-\infty}^{
     \infty}\int_{-\infty}^{\infty}\exp\left(i\Phi^{(\mathrm{U})}\left(s,t;\ma
     thbf{x}\right)\right)\mathrm{d}s\mathrm{d}t as input.

<math 
  xmlns='http://www.w3.org/1998/Math/MathML'>
  <semantics>
    <mi>$Failed</mi>
    <annotation-xml encoding='MathML-Content'>
      <ci>$Failed</ci>
    </annotation-xml>
  </semantics>
</math>