Mathematics – Classical Analysis and ODEs
Scientific paper
2003-01-06
Electronic Transactions on Numerical Analysis 19 (2005), 1-17
Mathematics
Classical Analysis and ODEs
16 pages, 4 figures
Scientific paper
In this paper we study the orthogonality conditions satisfied by Jacobi polynomials $P_n^{(\alpha,\beta)}$ when the parameters $\alpha$ and $\beta$ are not necessarily $>-1$. We establish orthogonality on a generic closed contour on a Riemann surface. Depending on the parameters, this leads to either full orthogonality conditions on a single contour in the plane, or to multiple orthogonality conditions on a number of contours in the plane. In all cases we show that the orthogonality conditions characterize the Jacobi polynomial $P_n^{(\alpha, \beta)}$ of degree $n$ up to a constant factor.
Kuijlaars Arno B. J.
Martinez-Finkelshtein Andrei
Orive Ramón
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