symbolic operations
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21: 13.3 Recurrence Relations and Derivatives
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13.3.16
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13.3.17
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13.3.23
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13.3.25
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โบOther versions of several of the identities in this subsection can be constructed with the aid of the operator identity
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22: 1.6 Vectors and Vector-Valued Functions
23: 16.3 Derivatives and Contiguous Functions
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16.3.1
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16.3.2
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16.3.3
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16.3.4
โบOther versions of these identities can be constructed with the aid of the operator identity
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24: 18.19 Hahn Class: Definitions
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โบThe Askey scheme extends the three families of classical OP’s (Jacobi, Laguerre and Hermite) with eight further families of OP’s for which the role of the differentiation operator
in the case of the classical OP’s is played by a suitable difference operator.
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2.
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Hahn class (or linear lattice class). These are OP’s where the role of is played by or or (see §18.1(i) for the definition of these operators). The Hahn class consists of four discrete and two continuous families.
Wilson class (or quadratic lattice class). These are OP’s ( of degree in , quadratic in ) where the role of the differentiation operator is played by or or . The Wilson class consists of two discrete and two continuous families.
18.19.5
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25: 18.26 Wilson Class: Continued
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18.26.2
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18.26.5
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โบFor comments on the use of the forward-difference operator
, the backward-difference operator
, and the central-difference operator
, see §18.2(ii).
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18.26.16
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18.26.17
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26: Bibliography K
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Lowering and Raising Operators for Some Special Orthogonal Polynomials.
In Jack, Hall-Littlewood and Macdonald Polynomials,
Contemp. Math., Vol. 417, pp. 227–238.
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Fractional integral and generalized Stieltjes transforms for hypergeometric functions as transmutation operators.
SIGMA Symmetry Integrability Geom. Methods Appl. 11, pp. Paper 074, 22.
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Jacobi polynomials, Bernstein-type inequalities and dispersion estimates for the discrete Laguerre operator.
Adv. Math. 333, pp. 796–821.
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Algebras of Virasoro type, the energy-momentum tensor, and operator expansions on Riemann surfaces.
Funktsional. Anal. i Prilozhen. 23 (1), pp. 24–40 (Russian).
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Construction of differential operators having Bochner-Krall orthogonal polynomials as eigenfunctions.
J. Math. Anal. Appl. 324 (1), pp. 285–303.
27: 18.28 Askey–Wilson Class
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) such that in the Askey–Wilson case, and in the -Racah case, and both are eigenfunctions of a second order -difference operator similar to (18.27.1).
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18.28.4
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โบwhere the operator
is defined by
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โบIn Tsujimoto et al. (2012) an extension of the Bannai–Ito polynomials occurs as eigenfunctions of a Dunkl type operator.
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28: 31.10 Integral Equations and Representations
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31.10.3
โบwhere is Heun’s operator in the variable
:
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โบThe solutions of (31.10.8) are given in terms of the Riemann -symbol (see §15.11(i)) as
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โบFor suitable choices of the branches of the -symbols in (31.10.9) and the contour , we can obtain both integral equations satisfied by Heun functions, as well as the integral representations of a distinct solution of Heun’s equation in terms of a Heun function (polynomial, path-multiplicative solution).
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31.10.14
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29: Bibliography G
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Symbolic Computation, Number Theory, Special Functions, Physics and Combinatorics.
Developments in Mathematics, Vol. 4, Kluwer Academic Publishers, Dordrecht.
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Generalized Functions. Vol. 1: Properties and Operations.
Academic Press, New York.
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WKB and turning point theory for second-order difference equations.
In Spectral Methods for Operators of Mathematical Physics,
Oper. Theory Adv. Appl., Vol. 154, pp. 101–138.
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Riemann surfaces, plane algebraic curves and their period matrices.
J. Symbolic Comput. 26 (6), pp. 789–803.
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A new identity for some six-
symbols.
J. Math. Phys. 32 (6), pp. 1430–1432.
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