Polynomials, orthogonal on Sobolev, derived by the Chebyshev polynomials, orthogonal on the uniform net

I. I. Sharapudinov ; T. I. Sharapudinov

Daghestan Electronic Mathematical Reports, Tome 5 (2016), pp. 56-75.

Résumé

In this article we consider the problem of constructing polynomials, orthogonal in Sobolev sence on the finite uniform net and associated with classical Chebyshev polynomials of discrete variable. We have found an explicit expression of these polynomials by classical Chebyshev polynomials. Also we have obtained an expansion of new polynomials by generalized powers of Newton type. We obtain expressions for the deviation of a discrete function and its finite differences from respectively partial sums of its Fourier series on the new system of polynomials and their finite differences.

Détail

Keywords: Polynomials orthogonal in Sobolev sence, Chebyshev polynomials orthogonal on the grid, approximation of discrete functions, mixed series of Chebyshev polynomials orthogonal on a uniform grid.

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