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  1. Article:
    Démonstration élémentaire de la formule $\frac{\pi^2}{\sin^2 x\pi} = \sum_{\nu= -\infty}{\infty}\frac{1}{(x+\nu)^2}$
  2. Author:
    Lerch, Matyáš
  3. Source:
    Lerch, Matyáš / Démonstration élémentaire de la formule $$\frac{\pi^2}{\sin^2 x\pi} = \sum_{\nu= -\infty}{\infty}\frac{1}{(x+\nu)^2}$$
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