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@@ -58,6 +58,42 @@ |
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\text{Graph}(y) = \{ (t, y(t)) , t \in I_{\text{max}}\} |
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\] unbeschränkt ist, weil $t \to t_0 + T^{*} = \infty$ oder |
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$\Vert y(t) \Vert \xrightarrow{t \to t_0 + T^{*}} \infty$. |
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\begin{figure}[h] |
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\centering |
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\begin{tikzpicture}[declare function={f(\x) = tan(deg(\x-2));}] |
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\begin{axis}% |
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[default 2d plot, |
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grid=none, |
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ymax=4, |
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ymin=-4, |
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xmin=0, |
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xmax=4, |
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xtick=\empty, ytick=\empty, |
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] |
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\addplot[domain=0.56:3.56,samples=100,smooth,red] {f(x)}; |
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\draw[dashed] (0.56, 5) -- (0.56, -5); |
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\draw[dashed] (3.45, 5) -- (3.45, -5); |
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\draw (2.56, {f(2.56)}) node[fill,inner sep=1pt]{}; |
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\draw (2.56, {f(2.56)}) node[draw,shape=rectangle,minimum width=10mm, minimum height=7mm, |
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anchor=center] {}; |
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\draw (2.85, {f(2.85)}) node[fill,inner sep=1pt]{}; |
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\draw (2.85, {f(2.85)}) node[draw,shape=rectangle,minimum width=9mm, minimum height=7mm, |
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anchor=center] {}; |
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\draw (3.02, {f(3.02)}) node[fill,inner sep=1pt]{}; |
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\draw (3.02, {f(3.02)}) node[draw,shape=rectangle,minimum width=6mm, minimum height=6mm, |
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anchor=center] {}; |
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\draw (3.12, {f(3.12)}) node[fill,inner sep=1pt]{}; |
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\draw (3.12, {f(3.12)}) node[draw,shape=rectangle,minimum width=5mm, minimum height=5mm, |
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anchor=center] {}; |
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\draw (3.18, {f(3.18)}) node[fill,inner sep=1pt]{}; |
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\draw (3.18, {f(3.18)}) node[draw,shape=rectangle,minimum width=4mm, minimum height=4mm, |
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anchor=center] {}; |
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\draw (3.65, -4) node{$\partial D$}; |
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\end{axis} |
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\end{tikzpicture} |
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\caption{Schrittweise Fortsetzung einer Lösung bis zum Rand von $D$} |
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\end{figure} |
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\end{bem} |
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\begin{korollar}[Globale Existenz] |
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@@ -227,6 +263,7 @@ |
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\end{tikzpicture} |
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\caption{Für $y_0 = 0$ existieren beliebig viele zusammengesetzte Lösungen.} |
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\end{subfigure} |
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\caption{Zur Uneindeutigkeit von AWA} |
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\end{figure} |
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Beobachtung: $f(t,x)$ ist stetig auf $\R \times \R$, aber $f(t,x)$ ist nicht Lipschitz stetig |
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