ag-gipp/GoUldI

<math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msup><mi>&#x003A8;</mi><mrow><mo form="prefix">(</mo><mi mathvariant="normal">U</mi><mo form="postfix">)</mo></mrow></msup><mrow><mo rspace="0.3em" lspace="0em" stretchy="true" fence="true" form="prefix">(</mo><mi mathvariant="bold">x</mi><mo rspace="0em" lspace="0.3em" stretchy="true" fence="true" form="postfix">)</mo></mrow><mo>=</mo><mstyle displaystyle="true"><munderover><mo>&#x0222B;</mo><mrow><mo>-</mo><mo>&#x0221E;</mo></mrow><mo>&#x0221E;</mo></munderover></mstyle><mstyle displaystyle="true"><munderover><mo>&#x0222B;</mo><mrow><mo>-</mo><mo>&#x0221E;</mo></mrow><mo>&#x0221E;</mo></munderover></mstyle><mi>exp</mi><mrow><mo rspace="0.3em" lspace="0em" stretchy="true" fence="true" form="prefix">(</mo><mi>i</mi><msup><mi>&#x003A6;</mi><mrow><mo form="prefix">(</mo><mi mathvariant="normal">U</mi><mo form="postfix">)</mo></mrow></msup><mo rspace="0.3em" lspace="0em" stretchy="true" fence="true" form="prefix">(</mo><mi>s</mi><mo>,</mo><mi>t</mi><mo>;</mo><mi mathvariant="bold">x</mi><mo rspace="0em" lspace="0.3em" stretchy="true" fence="true" form="postfix">)</mo><mo rspace="0em" lspace="0.3em" stretchy="true" fence="true" form="postfix">)</mo></mrow><mi mathvariant="normal">d</mi><mi>s</mi><mi mathvariant="normal">d</mi><mi>t</mi></mrow></math>