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31—40 of 142 matching pages
31: 27.19 Methods of Computation: Factorization
32: 33.6 Power-Series Expansions in
§33.6 Power-Series Expansions in
…33: 33.19 Power-Series Expansions in
§33.19 Power-Series Expansions in
…34: 35.9 Applications
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►For other statistical applications of functions of matrix argument see Perlman and Olkin (1980), Groeneboom and Truax (2000), Bhaumik and Sarkar (2002), Richards (2004) (monotonicity of power functions of multivariate statistical test criteria), Bingham et al. (1992) (Procrustes analysis), and Phillips (1986) (exact distributions of statistical test criteria).
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35: 27.7 Lambert Series as Generating Functions
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►If , then the quotient is the sum of a geometric series, and when the series (27.7.1) converges absolutely it can be rearranged as a power series:
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27.7.5
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36: 28.34 Methods of Computation
37: 10.74 Methods of Computation
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►The power-series expansions given in §§10.2 and 10.8, together with the connection formulas of §10.4, can be used to compute the Bessel and Hankel functions when the argument or is sufficiently small in absolute value.
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►In other circumstances the power series are prone to slow convergence and heavy numerical cancellation.
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►A comprehensive and powerful approach is to integrate the differential equations (10.2.1) and (10.25.1) by direct numerical methods.
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►In the interval , needs to be integrated in the forward direction and in the backward direction, with initial values for the former obtained from the power-series expansion (10.2.2) and for the latter from asymptotic expansions (§§10.17(i) and 10.20(i)).
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►If values of the Bessel functions , , or the other functions treated in this chapter, are needed for integer-spaced ranges of values of the order , then a simple and powerful procedure is provided by recurrence relations typified by the first of (10.6.1).
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38: 19.19 Taylor and Related Series
§19.19 Taylor and Related Series
… ►39: 27.13 Functions
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►This problem is named after Edward Waring who, in 1770, stated without proof and with limited numerical evidence, that every positive integer is the sum of four squares, of nine cubes, of nineteen fourth powers, and so on.
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►Hardy and Littlewood (1925) conjectures that when is not a power of 2, and that when is a power of 2, but the most that is known (in 2009) is for some constant .
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►Mordell (1917) notes that is the coefficient of in the power-series expansion of the th power of the series for .
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