ag-gipp/GoUldI

<math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>am</mi><mrow><mo rspace="0.3em" lspace="0em" stretchy="true" fence="true" form="prefix">(</mo><mi>x</mi><mo>,</mo><mi>k</mi><mo rspace="0em" lspace="0.3em" stretchy="true" fence="true" form="postfix">)</mo></mrow><mo>=</mo><mstyle displaystyle="true"><munderover><mo>&#x0222B;</mo><mn>0</mn><mi>x</mi></munderover></mstyle><mi>dn</mi><mrow><mo rspace="0.3em" lspace="0em" stretchy="true" fence="true" form="prefix">(</mo><mi>t</mi><mo>,</mo><mi>k</mi><mo rspace="0em" lspace="0.3em" stretchy="true" fence="true" form="postfix">)</mo></mrow><mi mathvariant="normal">d</mi><mi>t</mi></mrow></math>