The system of powers of conformal mappings and biorthogonal to them systems of the functions

Fìz.-mat. model. ìnf. tehnol. 2016, 26:31-44

Authors

  • Halyna Ivasyk Lviv Polytechnic National University, S. Bandera str., 12, 79013, Lviv, Ukraine

DOI:

https://doi.org/10.15407/fmmit2017.26.031

Keywords:

biorthogonal systems, conformal mapping, functional series, Helmholtz equation

Abstract

In this article we review the methods of power summation of factors. The degree of factors which are arbitrary powers of summation indices are considered. We show that using the Poisson-Abel method only those series can be summarized the order of member increase of which is proportional to the exponent depending on the summation index. At the same time the Gauss-Weierstrass method and other power factors methods can be also applied to the series the terms of which increase in proportion to the exponential dependence of the indices summation.

References
  1. Dzyadyk, V. K. (1977). Introduction to the theory of approximation of functions by polynomials. M .: Nauka.
  2. Leont'ev, A. F. (1980). Sequences of polynomials of exponential functions. M .: Science.
  3. Markushevich, A. I. The theory of analytic functions. Volume 2. M .: Nauka.
  4. Smirnov, V. I, Lebedev, N. A. (1964). The constructive theory of complex functionsAC. M .: Science.
  5. Suhorolsky, M. A. (2010). Development of the functions for system of polynomials, biorthohonal on closed contour of a system of regular at infinity far point of the function. Ukr. mat. Zh., 62(2), 238-254.
  6. Suhorolsky, M. A., & Lukovskii, І.O., Kіt, G.S., Kushnіr, R.M. (Eds.). (2014). Analytical solutions of Helmholtz equation. Matematichnі problemi mechanіki neodnorіdnih agencies, 160-163.
  7. Sukhorolsky, M. A, Dostoyna, V. V. (2013). One class of biorthogonal systems of functions that arise in the solution of the Helmholtz equation in the cylindrical coordinate system. J. Math. Sci., 192(5), 541-554.
    DOI https://doi.org/10.1007/s10958-013-1415-5
  8. Korn, G. A., Korn, T. M. (2000). Mathematical Handbook for Scientists and Engineers. DOVER PUBLICATIONS, INC: Mineola, New York.
  9. Lavrent'ev, M. A., Shabat, B. V. (1987). Methods of complex function theory. M .: Nauka.

Downloads

Published

2018-11-06

How to Cite

Ivasyk, H. (2018). The system of powers of conformal mappings and biorthogonal to them systems of the functions: Fìz.-mat. model. ìnf. tehnol. 2016, 26:31-44. PHYSICO-MATHEMATICAL MODELLING AND INFORMATIONAL TECHNOLOGIES, (26), 31–44. https://doi.org/10.15407/fmmit2017.26.031