Abstract:
We consider polynomials $p_{r,n}^{\alpha,\beta}(x)$$(n=0,1,\ldots)$, generated by classical Jacobi polynomials $p_{n}^{\alpha,\beta}(x)$ and forming orthonormal system with respect to Sobolev-type inner product
\begin{equation*}
<f,g>=\sum_{\nu=0}^{r-1}f^{(\nu)}(-1)g^{(\nu)}(-1)+\int_{-1}^{1}f^{(r)}(t)g^{(r)}(t)\rho(t) dt,
\end{equation*}
where $\rho(x)=(1-x)^\alpha(1+x)^\beta$ – Jacobi weight function.
The explicit \linebreak representations for polynomials $p_{r,n}^{\alpha,\beta}(x)$ are obtained and using these ones the asymptotic properties of polynomials $p_{r,n}^{\alpha,\beta}(x)$ are investigated.
Keywords:orthogonal polynomials, Sobolev orthogonal polynomials, Jacobi polynomials, Chebyshev polynomials of the first kind, Legendre polynomials.