Belonging to convergence classes of Hadamard compositions of Gelfond-Leont'ev derivatives for analytic functions


  • O.M. Mulyava National University of Food Technologies, 68 Volodymyrska str., 01601, Kyiv, Ukraine
  • M.M. Sheremeta Ivan Franko Lviv National University, 1 Universytetska str., 79000, Lviv, Ukraine


entire function, analytic function in the unit disk, Gelfond-Leont'ev derivative, Hadamard composition
Published online: 2012-06-28


The conditions are found, under which the belonging to Valiron convergence class of entire functions $f$ and $g$ implies the belonging to this class of Gelfond-Leont'ev derivative of Hadamard composition of functions $f$ and $g$ and of Hadamard composition of Gelfond-Leont'ev derivatives of these functions. Analogous problem is solved for analytic functions in the unit disk.

How to Cite
Mulyava, O.; Sheremeta, M. Belonging to Convergence Classes of Hadamard Compositions of Gelfond-Leont’ev Derivatives for Analytic Functions. Carpathian Math. Publ. 2012, 4, 111-115.

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