asymptotic approximations for large order
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11: 25.11 Hurwitz Zeta Function
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§25.11(xii) -Asymptotic Behavior
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25.11.41
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25.11.42
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►As in the sector , with and fixed, we have the asymptotic expansion
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►Similarly, as in the sector ,
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12: 13.8 Asymptotic Approximations for Large Parameters
§13.8 Asymptotic Approximations for Large Parameters
… ►§13.8(ii) Large and , Fixed and
… ►§13.8(iii) Large
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…13: 2.11 Remainder Terms; Stokes Phenomenon
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§2.11(i) Numerical Use of Asymptotic Expansions
… ► ►In order to guard against this kind of error remaining undetected, the wanted function may need to be computed by another method (preferably nonasymptotic) for the smallest value of the (large) asymptotic variable that is intended to be used. … ►§2.11(iii) Exponentially-Improved Expansions
… ►§2.11(vi) Direct Numerical Transformations
…14: 13.20 Uniform Asymptotic Approximations for Large
§13.20 Uniform Asymptotic Approximations for Large
►§13.20(i) Large , Fixed
… ► … ►For uniform approximations valid when is large, , and , see Olver (1997b, pp. 401–403). … ►15: 13.22 Zeros
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►Asymptotic approximations to the zeros when the parameters and/or are large can be found by reversion of the uniform approximations provided in §§13.20 and 13.21.
For example, if is fixed and is large, then the th positive zero of is given by
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13.22.1
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16: 12.11 Zeros
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§12.11(ii) Asymptotic Expansions of Large Zeros
… ►When the zeros are asymptotically given by and , where is a large positive integer and … ►§12.11(iii) Asymptotic Expansions for Large Parameter
►For large negative values of the real zeros of , , , and can be approximated by reversion of the Airy-type asymptotic expansions of §§12.10(vii) and 12.10(viii). For example, let the th real zeros of and , counted in descending order away from the point , be denoted by and , respectively. …17: Bibliography D
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Uniform asymptotic expansions for prolate spheroidal functions with large parameters.
SIAM J. Math. Anal. 17 (6), pp. 1495–1524.
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Uniform asymptotic approximation of Mathieu functions.
Methods Appl. Anal. 1 (2), pp. 143–168.
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Asymptotic approximations for the Jacobi and ultraspherical polynomials, and related functions.
Methods Appl. Anal. 6 (3), pp. 21–56.
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Uniform asymptotic expansions for associated Legendre functions of large order.
Proc. Roy. Soc. Edinburgh Sect. A 133 (4), pp. 807–827.
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Uniform asymptotic approximations for incomplete Riemann zeta functions.
J. Comput. Appl. Math. 190 (1-2), pp. 339–353.
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