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On Hadamard compositions of Gelfond–Leont'ev derivatives of analytic functions
M. N. Sheremetaa, O. M. Mulyavab a Ivan Franko National University of Lviv, 1 Universytetska str., Lviv, 79000 Ukraine
b Kyiv National University of Food Technologies, 68 Volodymyrska str., Kyiv, 01033 Ukraine
Abstract:
For analytic functions $f$ and $g$ given by power series with different finite convergence radii, properties of the Hadamard composition of their Gelfond–Leont'ev derivatives is investigated. For study, generalized orders are used. The connection between the growth of the maximal term of the Hadamard composition of Gelfond–Leont'ev derivatives and the growth of the maximal term of the Gelfond–Leont'ev derivative of Hadamard composition is established. Similar results is obtained in terms of the classical order and lower order of growth.
Keywords:
analytic function, Hadamard composition, Gelfond–Leont'ev derivative, maximal term.
Received: 18.07.2020 Revised: 03.09.2020 Accepted: 01.10.2020
Citation:
M. N. Sheremeta, O. M. Mulyava, “On Hadamard compositions of Gelfond–Leont'ev derivatives of analytic functions”, Izv. Vyssh. Uchebn. Zaved. Mat., 2021, no. 7, 67–80; Russian Math. (Iz. VUZ), 65:7 (2021), 58–70
Linking options:
https://www.mathnet.ru/eng/ivm9696 https://www.mathnet.ru/eng/ivm/y2021/i7/p67
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