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Many special functions appear as solutions of differential equations or integrals of elementary functions. Most special functions have relationships with representation theory of Lie groups.

5 votes
Accepted

A generalized logarithmic function

Let us calculate $f_{\epsilon}(x) - \frac{1}{\epsilon}\log(1 + x)$ using your formula for $\log(1 + x)$ as $f_1(x)$(I didn't checked it but believe that it is correct): $f_\epsilon(x) - \frac{1}{\eps …
Aleksei Kulikov's user avatar
3 votes

Is this closed-form summation a special case of known Lerch zeta function formulas?

Let me suggest a more pedestrian approach than the elegant solution of Christian Remling but which is arguably easier to come up with: contour integration. To get the sum over $\mathbb{Z}$ from a cont …
Aleksei Kulikov's user avatar