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fix typo in 10.2 (#11)
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dariusptrs authored Mar 25, 2024
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2 changes: 1 addition & 1 deletion Lineare-Algebra.tex
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Expand Up @@ -558,7 +558,7 @@ \subsubsection{Rezept: Singulärwertzerlegung}
\subsubsection{Kompression}
\begin{itemize}\itemsep0pt
\item Rang k Matrix $A_{(k)}=V\Sigma_{(k)}W^\top$. Die Matrix $\Sigma_{(k)}$ enthält nur die Singulärwerte $\sigma_1, ...,\sigma_k$. ($\sigma_{k+1}, ...,\sigma_{n/m}$ mit 0 ersetzen).\\
\item Frobenius-Norm $|| A ||_F = \sqrt[]{\sum_{i=1}^{m} \sum_{j=1}^{m} {a^{2}_{i,j}}}$\\
\item Frobenius-Norm $|| A ||_F = \sqrt[]{\sum_{i=1}^{m} \sum_{j=1}^{n} {a^{2}_{i,j}}}$\\
\item Es gilt: $|| A-A_{(k)} ||_F \leq || A-B ||_F$ mit $B$ als eine beliebige Matrix des $\mathbb{R}^{m\times n}$ mit $rang(B) \leq rang(A_{(k)}) = k$
\item Speicheraufwand einer Matrix $A\in \mathbb{R}^{m\times n}$: $rang(A) \cdot (m+n)$
\end{itemize}
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