Abstract
What is the most interesting formula involving elementary functions? In his beautiful article [2], whose exposition we closely follow, Jürgen Elstrodt nominates as a first candidate the partial fraction expansion of the cotangent function:
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Aigner, M., Ziegler, G.M. (2018). Cotangent and the Herglotz trick. In: Proofs from THE BOOK. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-57265-8_26
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DOI: https://doi.org/10.1007/978-3-662-57265-8_26
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Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-662-57264-1
Online ISBN: 978-3-662-57265-8
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