asymptotic expansions for large parameters
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31: 8.21 Generalized Sine and Cosine Integrals
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§8.21(vi) Series Expansions
►Power-Series Expansions
… ►Spherical-Bessel-Function Expansions
… ►For (8.21.16), (8.21.17), and further expansions in series of Bessel functions see Luke (1969b, pp. 56–57). … ►§8.21(viii) Asymptotic Expansions
…32: 10.70 Zeros
§10.70 Zeros
►Asymptotic approximations for large zeros are as follows. …If is a large positive integer, then ►
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33: 10.72 Mathematical Applications
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►Bessel functions and modified Bessel functions are often used as approximants in the construction of uniform asymptotic approximations and expansions for solutions of linear second-order differential equations containing a parameter.
…where is a real or complex variable and is a large real or complex parameter.
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►In regions in which (10.72.1) has a simple turning point , that is, and are analytic (or with weaker conditions if is a real variable) and is a simple zero of , asymptotic expansions of the solutions for large
can be constructed in terms of Airy functions or equivalently Bessel functions or modified Bessel functions of order (§9.6(i)).
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►In regions in which the function has a simple pole at and is analytic at (the case in §10.72(i)), asymptotic expansions of the solutions of (10.72.1) for large
can be constructed in terms of Bessel functions and modified Bessel functions of order , where is the limiting value of as .
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►Then for large
asymptotic approximations of the solutions can be constructed in terms of Bessel functions, or modified Bessel functions, of variable order (in fact the order depends on and ).
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34: 28.25 Asymptotic Expansions for Large
§28.25 Asymptotic Expansions for Large
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28.25.1
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28.25.3
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►The expansion (28.25.1) is valid for when
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28.25.4
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35: 18.26 Wilson Class: Continued
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§18.26(v) Asymptotic Approximations
►For asymptotic expansions of Wilson polynomials of large degree see Wilson (1991), and for asymptotic approximations to their largest zeros see Chen and Ismail (1998). ►Koornwinder (2009) rescales and reparametrizes Racah polynomials and Wilson polynomials in such a way that they are continuous in their four parameters, provided that these parameters are nonnegative. Moreover, if one or more of the new parameters becomes zero, then the polynomial descends to a lower family in the Askey scheme.36: 10.19 Asymptotic Expansions for Large Order
§10.19 Asymptotic Expansions for Large Order
►§10.19(i) Asymptotic Forms
… ►§10.19(ii) Debye’s Expansions
… ►§10.19(iii) Transition Region
… ►See also §10.20(i).37: 30.9 Asymptotic Approximations and Expansions
§30.9 Asymptotic Approximations and Expansions
►§30.9(i) Prolate Spheroidal Wave Functions
… ►For uniform asymptotic expansions in terms of Airy or Bessel functions for real values of the parameters, complex values of the variable, and with explicit error bounds see Dunster (1986). … ►For uniform asymptotic expansions in terms of elementary, Airy, or Bessel functions for real values of the parameters, complex values of the variable, and with explicit error bounds see Dunster (1992, 1995). … ►38: 14.26 Uniform Asymptotic Expansions
§14.26 Uniform Asymptotic Expansions
►The uniform asymptotic approximations given in §14.15 for and for are extended to domains in the complex plane in the following references: §§14.15(i) and 14.15(ii), Dunster (2003b); §14.15(iii), Olver (1997b, Chapter 12); §14.15(iv), Boyd and Dunster (1986). For an extension of §14.15(iv) to complex argument and imaginary parameters, see Dunster (1990b). ►See also Frenzen (1990), Gil et al. (2000), Shivakumar and Wong (1988), Ursell (1984), and Wong (1989) for uniform asymptotic approximations obtained from integral representations.39: 13.29 Methods of Computation
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