Limit of the Logarithmic Derivative

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\lim_{s\rightarrow 1}\left(\frac{\zeta'(s)}{\zeta(s)}+\frac{1}{s-1}\right)=\gamma

The logarithmic derivative of a function can derive crucial properties. By applying this approach to the Riemann Zeta Function, we encounter the well-known Euler-Mascheroni constant.

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