Izvestiya of Saratov University.

Mathematics. Mechanics. Informatics

ISSN 1816-9791 (Print)
ISSN 2541-9005 (Online)

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Sultanakhmedov M. S. Special Wavelets Based on Chebyshev Polynomials of the Second Kind and their Approximative Properties. Izvestiya of Saratov University. Mathematics. Mechanics. Informatics, 2016, vol. 16, iss. 1, pp. 34-41. DOI: 10.18500/1816-9791-2016-16-1-34-41, EDN: VUSODX

This is an open access article distributed under the terms of Creative Commons Attribution 4.0 International License (CC-BY 4.0).
Published online: 
14.03.2016
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Language: 
Russian
Heading: 
Mathematics
UDC: 
517.51
DOI: 
10.18500/1816-9791-2016-16-1-34-41
EDN: 
VUSODX

Special Wavelets Based on Chebyshev Polynomials of the Second Kind and their Approximative Properties

Autors: 
Sultanakhmedov Murad Salikhovich, Daghestan Scientific Centre of Russian Academy of Sciences
Abstract: 

The system of wavelets and scalar functions based on Chebyshev polynomials of the second kind and their zeros is considered. With the help of them we construct a complete orthonormal system of functions. A certain disadvantage is shown in approximation properties of partial sums of the corresponding wavelet series, related to the properties of Chebyshev polynomials themselves and meaning a significant decrease of the rate of their convergence to the original function at the endpoints of orthogonality segment. As an alternative, we propose a modification of Chebyshev wavelet series of the second kind by analogy to the special polynomial series with the property of adhesion. These new special wavelet series is proved to be deprived of the mentioned disadvantage and to have better approximative properties.

Key words: 
polynomial wavelets
special wavelet series
Chebyshev polynomials of the second kind
function approximation
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Received: 
14.11.2015
Accepted: 
26.02.2016
Published: 
31.03.2016
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