Talk:Aufgaben:Problem 1

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Ich verstehe diesen Schritt nicht ganz (Warum kommt das k da aus dem Integral raus?):

\( \frac{1}{\sqrt{2\pi}}\int_{\mathbb{R}}-i\frac{k^2}{2}\hat g(k)e^{ikx-i\frac{k^2}{2}t}dk = -\frac{ik^2}{4\pi}\int_{\mathbb{R}}\hat g(k)e^{ikx-i\frac{k^2}{2}t}dk \)