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Adren

I am teaching mathematics in the so called "classes préparatoires aux grandes écoles".

Other centers of interest are music (used to play classical guitar for years) with a special devotion for Bach's music and hiking in nature.

One of my favorites formulas :

$$\gamma=\frac{\ln(2)}{2}+\frac{1}{\ln(2)}\sum_{n=2}^\infty\frac{(-1)^n\ln(n)}{n}$$

where $\gamma$ is Euler constant.

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