Sobolev orthogonal polynomials and second-order differential equations

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There has been a considerable amount of recent research on the subject of Sobolev orthogonal polynomials. In this paper, we consider the problem of when a sequence of polynomials that are orthogonal with respect to the (Sobolev) symmetric bilinear form (p,q)1 = integral(R) pqd mu(0) + integral(R) p'q'd mu(1) satisfies a second-order differential equation of the form a(2) (x)y"(x) + a(1)(x)y'(x)= lambda ny(x). We shall obtain necessary and sufficient conditions for this to occur. Moreover, we will characterize all sequences of polynomials satisfying these conditions. Included in this classification are some, in a sense, new orthogonal polynomials. As a consequence of this work, we obtain a new characterization of the classical orthogonal polynomials of Jacobi, Laguerre, Hermite, and Bessel.
Publisher
ROCKY MT MATH CONSORTIUM
Issue Date
1998
Language
English
Article Type
Article
Keywords

SETS

Citation

ROCKY MOUNTAIN JOURNAL OF MATHEMATICS, v.28, no.2, pp.547 - 594

ISSN
0035-7596
URI
http://hdl.handle.net/10203/71957
Appears in Collection
MA-Journal Papers(저널논문)
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