10.17721/1812-5409.2021/2

Author:

Teteruk I. S.,

Abstract

Generalized instantaneous image were introduced by V.K. Dzyaduk in 1981 and proved to be aconvenient tool for constructing and studying the Padé approximants and their generalizations. The method of generalized instantaneous images proposed by Dzyadyk madeit possible to construct and studyrational Padé approximants and their generalizations for many classes of special functions from a single position. As an example, the Padé approximants is constructed for a class of basic hypergeometric series, which includes a q-analogue of the exponential function In this paper the construction of the Pade approximants for the function of two variables is investigated. A two-dimensional functional sequence is constructed, which has a generalized instantaneous image, and rational approximants are determined, which will be generalizations of one-dimensional Padé approximants. The function of the two variables is entirely ~ related to the basic hypergeometric series, namely with the q-analog of the exponent e_q.

Publisher

Taras Shevchenko National University of Kyiv

Subject

Medical Assisting and Transcription,Medical Terminology

Reference8 articles.

1. 1. DZYADYK V. K., (1981) On the generalization of the problem of moments, Dop. AN URSR 6, p. 8-12. (In Ukrainian)

2. 2. GOLUB A. P., (2002) Generalized moment representations and Pade approximants, Proceedings of the Institute of Mathematics NAS Ukraine, 222 p. (In Ukrainian)

3. 3. BEJKER DZH. and GREJVS-MORRIS P.R., Padé Approximants (1986), 502 p.

4. 4. GOLUB A. P. and CHERNECKA L. O., (2013) Two Dimensional Generalized Moment Representations and Rational Approximations of Functions of Two Variables, UMJ 65,8, p. 1035-1058. (In Ukrainian)

5. 5. GOLUB A. P., (1981) Generalized moment representations of basic hypergeometric series, UMJ 41 №6, p. 803-808. (In Russian)

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