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Approximation of entire transcendental functions of several complex variables in some Banach spaces for slow growth

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Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
In the present paper, the coefficients characterizations of generalized type Tm(f; α, α) of entire transcendental functions f of several complex variables m (m ≥ 2) for slow growth have been obtained in terms of the sequence of best polynomial approximations of f in the Hardy Banach spaces Hq(Um) and in the Banach spaces Bm(p, q, λ). The presented work is the extension and refinement of the corresponding assertions made by Vakarchuk and Zhir [20-25], Gol’dberg [4] and Sheremeta [17, 18] to the multidimensional case.
Wydawca
Rocznik
Strony
9--20
Opis fizyczny
Bibliogr. 25 poz.
Twórcy
autor
  • Department of Mathematics, Faculty of Sciences Al-Baha University, P.O. Box-1988, Alaqiq, Al-Baha 65431, Saudi Arabia
  • Department of Mathematics, Research and Post Graduate Studies, M.M.H. College, Model Town, Ghaziabad 201001, U.P., India
Bibliografia
  • [1] M. Z. Dveirin, On the relationship between the rate of polynomial approximation of an entire function and its order and type, Ukrainian Math. J. 67 (2015), no. 10, 1498-1514.
  • [2] B. A. Fuks, Introduction to Theory of Analytic Functions of many Complex Variables (in Russian), Fizmatgiz, Moscow, 1962.
  • [3] A. Giroux, Approximation of entire functions over bounded domains, J. Approx. Theory 28 (1980), no. 1, 45-53.
  • [4] A. A. Gol’dberg, Elementary remarks on the formulas for the determination of the order and type of entire functions of many complex variables, Dokl. Akad. Nauk Arm. SSSR 29 (1959), no. 4, 145-151.
  • [5] M. I. Gvaradze, On one class of spaces of analytic functions (in Russian), Candidate Degree Thesis (Physics and Mathematics), Tbilisi, 1975.
  • [6] M. I. Gvaradge, On one class of spaces of analytic functions, Mat. Zametki 21 (1977), no. 2, 141-150.
  • [7] M. I. Gvaradze, Factors of one class of analytic functions defined on a polydisk, Tr. Tbilis. Mat. Inst. 66 (1988), 15-21.
  • [8] I. I. Ibragimov and N. I. Shikhaliev, On the best polynomial approximation of analytic functions in a space of analytic functions, Dokl. Akad. Nauk SSSR 227 (1976), no. 2, 280-283.
  • [9] G. P. Kapoor and A. Nautiyal, Polynomial approximation of an entire function of slow growth, J. Approx. Theory 32 (1981), 64-75.
  • [10] D. Kumar, Approximation of entire function solutions of Helmholtz equation having slow growth, J. Appl. Anal. 18 (2012), 179-196.
  • [11] D. Kumar, Generalized growth and approximation of entire function solution of Helmholtz equation in Banach spaces, Ann. Univ. Ferrara Sez. VII Sci. Mat. 62 (2016), no. 1, 83-97.
  • [12] D. Kumar, On the growth and approximation of transcendental entire functions on algebraic varieties, Int. J. Anal. Appl. 12 (2016), no. 1, 22-29.
  • [13] D. Kumar, On the growth and best polynomial approximation of entire functions in Cm(m £ 2) in some Banach spaces, J. Anal. (2017), DOI 10.1007/s41478-017-0033-x.
  • [14] V. M. Muradov, On the relationship between the best polynomial approximation of analytic functions of many complex variables and the Faber coefficients, in: Special Problems of the Theory of Functions, Academy of Sciences of Aserbaidschan, Baku (1986), 195-212.
  • [15] G. Ramesh and G. S. Srivastava, Approximation of entire functions of slow growth, General Math. 14 (2006), no. 2, 59-76.
  • [16] S. M. Shah, Polynomial approximation of an entire function and generalized orders, J. Approx. Theory 19 (1977), no. 4, 315-324.
  • [17] M. N. Sheremeta, On the relationship between the growth of the maximum modulus of an entire function and the moduli of coefficients of its power expansions, Izv. Vyssh. Uchebn. Zaved. Ser. Mat. (1967), no. 2, 100-108.
  • [18] M. N. Sheremeta, On the relationship between the growth of entire or analytic functions of zero order in a disk and the coefficients of their power expansions, Izv. Vyssh. Uchebn. Zaved. Ser. Mat. (1968), no. 6, 115-121.
  • [19] S. B. Vakarchuk, On the best approximation by generalized polynomials in one space of analytic functions of two complex variables, Izv. Vyssh. Uchebn. Zaved. Ser. Mat. (1991), no. 7, 14-25.
  • [20] S. B. Vakarchuk, On the best polynomial approximation of entire transcendental functions in Banach spaces. I, Ukraïn. Mat. Zh. 47 (1994), no. 9, 1123-1133.
  • [21] S. B. Vakarchuk, On the best polynomial approximation of entire transcendental functions in Banach spaces. II, Ukraïn. Mat. Zh. 47 (1994), no. 10, 1318-1322.
  • [22] S. B. Vakarchuk, On the best polynomial approximation of functions analytic in the unit circle in Banach spaces, Mat. Zametki 55 (1994), no. 4, 6-14.
  • [23] S. B. Vakarchuk and S. I. Zhir, On some problems of polynomial approximation of entire transcendental functions, Ukrainian Math. J. 54 (2002), no. 9, 1393-1401.
  • [24] S. B. Vakarchuk and S. I. Zhir, On the best polynomial approximations of entire transcendental functions of many complex variables in some Banach spaces, Ukrainian Math. J. 66 (2015), no. 12, 1763-1811.
  • [25] S. I. Zhir and S. B. Vakarchuk, Some problems of the best polynomial approximation of entire transcendental functions of one and many complex variables, in: Abstract of the International Conference “Approximation Theory of Functions and Its Applications” on the 70th Birthday of O.İ. Stepanets, Ukrainian National Academy of Science, Kyiv (2012), 44-45.
Uwagi
Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-896fda39-7092-420d-b5d3-ba194a1091a6
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