/sci/ - Science & Math

\documentclass{minimal} \usepackage[french]{babel} \begin{document} En~1735, Leonhard Euler résout le \textbf{problème de Bâle} en établissant la formule suivante: \[ \sum_{n=1}^{+\infty} \frac{1}{n^2} = \frac{\pi^2}{6} \] Cependant, il ne démontrera rigoureusement son résultat qu’en~1741. \end{document}

I saw that 5 days ago in a /sci/ thread

>>15554159
It was a different time. You went to see a picture at the theatre and everyone on screen was smoking. After a Google search, apparently you could even smoke inside the theatre back then.