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11: 35.9 Applications
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►In multivariate statistical analysis based on the multivariate normal distribution, the probability density functions of many random matrices are expressible in terms of generalized hypergeometric functions of matrix argument , with and .
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►In chemistry, Wei and Eichinger (1993) expresses the probability density functions of macromolecules in terms of generalized hypergeometric functions of matrix argument, and develop asymptotic approximations for these density functions.
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12: 7.12 Asymptotic Expansions
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►When the remainder terms are bounded in magnitude by the first neglected terms, and have the same sign as these terms when .
When the remainder terms are bounded in magnitude by times the first neglected terms.
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►For re-expansions of the remainder terms leading to larger sectors of validity, exponential improvement, and a smooth interpretation of the Stokes phenomenon, see §§2.11(ii)–2.11(iv) and use (7.11.3).
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►The remainder terms are given by
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►When , and are bounded in magnitude by the first neglected terms in (7.12.2) and (7.12.3), respectively, and have the same signs as these terms when .
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13: 18.32 OP’s with Respect to Freud Weights
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►However, for asymptotic approximations in terms of elementary functions for the OP’s, and also for their largest zeros, see Levin and Lubinsky (2001) and Nevai (1986).
For a uniform asymptotic expansion in terms of Airy functions (§9.2) for the OP’s in the case see Bo and Wong (1999).
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►All of these forms appear in applications, see §18.39(iii) and Table 18.39.1, albeit sometimes with , where the term half-Freud weight is used; or on or , where the term Rys weight is employed, see Rys et al. (1983).
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14: George E. Andrews
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►He has a long-term interest in the work of S.
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15: Preface
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►The term digital library has gained acceptance for this kind of information resource, and our choice of project title reflects our hope that the NIST DLMF will be a vehicle for revolutionizing the way applicable mathematics in general is practiced and delivered.
16: 9.19 Approximations
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§9.19(i) Approximations in Terms of Elementary Functions
… ►Moshier (1989, §6.14) provides minimax rational approximations for calculating , , , . They are in terms of the variable , where when is positive, when is negative, and when . The approximations apply when , that is, when or . The precision in the coefficients is 21S.
17: 34.8 Approximations for Large Parameters
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►Semiclassical (WKBJ) approximations in terms of trigonometric or exponential functions are given in Varshalovich et al. (1988, §§8.9, 9.9, 10.7).
Uniform approximations in terms of Airy functions for the and symbols are given in Schulten and Gordon (1975b).
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18: 8.23 Statistical Applications
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►In queueing theory the Erlang loss function is used, which can be expressed in terms of the reciprocal of ; see Jagerman (1974) and Cooper (1981, pp. 80, 316–319).
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19: 10.72 Mathematical Applications
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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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►If has a double zero , or more generally is a zero of order , , then uniform asymptotic approximations (but not expansions) can be constructed in terms of Bessel functions, or modified Bessel functions, of order .
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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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20: 13.27 Mathematical Applications
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►The other group elements correspond to integral operators whose kernels can be expressed in terms of Whittaker functions.
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