On approximation of functions by algebraic polynomials on the average in real domain with Chebyshev-Hermite weight

S.B. Vakarchuk (Alfred Nobel University), https://orcid.org/0000-0002-2562-8844
M.B. Vakarchuk (Oles Honchar Dnipropetrovsk National University)

Abstract


Exact inequalities of Jackson's type, connected with the best approximation of functions by algebraic polynomials, have been obtained in the space $$$L_{2,\rho}(\mathbb{R})$$$ at the Chebyshev-Hermite weight.

Keywords


best approximation; modulus of continuity; algebraic polynomial

References


Abilov V.A. "On degree of approximation of continuous functions by arithmetic means of partial sums of Fourier-Hermite series", Ivz. vuzov. Matematika, 1972; 3: pp. 3-9. (in Russian)

Rafalson S.Z. "On mean approximation of functions by Fourier-Hermite sums", Izv. vuzov, Matem., 1968; 7: pp. 78-84. (in Russian)

Froid G. "On approximation with weight by algebraic polynomials in real domain", Doklady AN SSSR, 1970; 191(2): pp. 293-294. (in Russian)

Mhaskar H.N. "Weighted polynomial approximation", J. Approx. Theory, 1986; 46(1): pp. 100-110. doi:10.1016/0021-9045(86)90089-4




DOI: https://doi.org/10.15421/241105

  

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Copyright (c) 2011 S.B. Vakarchuk, M.B. Vakarchuk

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ISSN (Online): 2664-5009
ISSN (Print): 2664-4991
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