fix typo in Harmonische Schwingung

Physik.tex

@@ -214,7 +214,7 @@ \subsection{Erzwungen gedämpft}
 		$A\rightarrow \frac{F_0m^{-1}}{\omega_0^2}=\frac{F_0}{k}$\\
 		$\Delta \varphi = 0 \qquad \Omega \rightarrow 0$
 	\item $\Omega \approx \omega_0$ (Katastrophe)\\
-		$A_{\ir max}=frac{F_0}{b\omega_0}=\frac{F_0/m}{2\delta \sqrt{\omega_0^2-\delta^2}} \rightarrow \infty$\\
+		$A_{\ir max}=\frac{F_0}{b\omega_0}=\frac{F_0/m}{2\delta \sqrt{\omega_0^2-\delta^2}} \rightarrow \infty$\\
 		$\Omega_{\ir max}=\sqrt{\omega_0^2-\frac{1}{2}(\frac{b}{m})^2}=\sqrt{\omega_0^2-2(\frac{3\pi \eta R}{m})^2}\rightarrow \omega_0$
 		$\Delta \varphi = \frac{\pi}{2} \qquad \delta \rightarrow 0$
 		\item $\Omega > \omega_0$\\