Expanding the function \(\ln(1 + \operatorname{e}^x)\) into power series in terms of the Dirichlet eta function and the Stirling numbers of the second kind
The authors provide several simple and alternative proofs of the conjecture proposed by G. Helms in the year 2013. They expand the composite function into power series whose coefficients are expressed in terms of the Dirichlet eta function and the Stirling numbers of the second kind.
scientific article; zbMATH DE number 7898637