add algebra, update some old stuff
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@@ -180,7 +180,7 @@
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= \frac{2}{2-p} 2^{-k \frac{2-p}{2}} \left( 1 - 2^{- \frac{2-p}{2}} \right)
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= \mu 2^{-k \frac{2 - p}{2}}
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.\end{salign*}
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Falls $p < 2$ ist $\frac{2-a}{2} > 0$ und damit
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Falls $p < 2$ ist $\frac{2-p}{2} > 0$ und damit
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$\Vert f_k \Vert_p^{p} = \mu 2^{- k \frac{2-p}{2}} \xrightarrow{k \to \infty} 0$.
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Also konvergiert $f_k$ in $L^{p}(\R)$ für $p < 2$.
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@@ -223,7 +223,7 @@
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insbesondere $(\mathscr{B}(\R^{n}), \mathscr{B}(\R))$-messbar.
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Seien nun $A_i \in \mathscr{B}(\R)$ für $i = 1, \ldots, n$. Dann ist
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\begin{salign*}
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\bigtimes_{i=1}^{n} A_i = \bigcap_{i=1}^{n} (A_i \cap \R)
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\bigtimes_{i=1}^{n} A_i = \bigcap_{i=1}^{n} (\R^{i-1} \times A_i \times \R^{n-i})
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= \bigcap_{i=1}^{n} \underbrace{\pi_{i}^{-1}(A_i)}_{\in \mathscr{B}(\R^{n})}
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\in \mathscr{B}(\R^{n})
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.\end{salign*}
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