Summary
The paper gives general formula (17) for coefficients of any real power ζ of a generalized power series (4). Four first coefficients are given by (19). An example of application to Bessel functions is described.
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Życzkowski, M. Potenzieren von verallgemeinerten Potenzreihen mit beliebigem Exponent. Journal of Applied Mathematics and Physics (ZAMP) 12, 572–576 (1961). https://doi.org/10.1007/BF01595314
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DOI: https://doi.org/10.1007/BF01595314