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۱The coefficients of differentiated expansions of double and triple Jacobi polynomials
نویسنده(ها): ، ، ،
اطلاعات انتشار: Bulletin of Iranian Mathematical Society، سي و هشتم،شماره۳(پياپي ۷۹)، ۲۰۱۲، سال
تعداد صفحات: ۲۸
Formulae expressing explicitly the coefficients of an expansion of double Jacobi polynomials which has been partially differentiated an arbitrary number of times with respect to its variables in terms of the coefficients of the original expansion are stated and proved. Extension to expansion of triple Jacobi polynomials is given. The results for the special cases of double and triple ultraspherical polynomials are considered. Also the results for Chebyshev polynomials of the first, second, third and fourth kinds and of Legendre polynomials are noted. An application of how to use double Jacobi polynomials for solving Poisson’s equation in two variables subject to nonhomogeneous mixed boundary conditions is described.
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