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@@ -2,8 +2,8 @@ |
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\begin{document} |
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\newcommand{\K}{\mathrm{K}} |
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\newcommand{\qnorm}[1]{\left|\left|#1\right|\right|^2} |
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\newcommand{\norm}[1]{\left|\left|#1\right|\right|} |
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\newcommand{\qnorm}[1]{\left\Vert#1\right\Vert^2} |
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\newcommand{\norm}[1]{\left\Vert#1\right\Vert} |
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\section{Fourier-Entwicklung} |
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\begin{definition}[Periodische Funktionen] |
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$f: \R \to \K$ heißt $L$-periodisch $(L >0)$ falls $f(x+L) = f(x)$, $\forall x \in \R (\implies f(x+kL) = f(x),\; \forall k\in \Z)$. |
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