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21: 10.65 Power Series
§10.65 Power Series
… ►§10.65(iii) Cross-Products and Sums of Squares
… ►§10.65(iv) Compendia
►For further power series summable in terms of Kelvin functions and their derivatives see Hansen (1975).22: 27.2 Functions
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►Functions in this section derive their properties from the fundamental
theorem of arithmetic, which states that every integer can be represented uniquely as a product of prime powers,
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27.2.6
►the sum of the th powers of the positive integers that are relatively prime to .
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►is the sum of the th powers of the divisors of , where the exponent can be real or complex.
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►where is a prime power with ; otherwise .
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23: 28.6 Expansions for Small
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§28.6(i) Eigenvalues
►Leading terms of the power series for and for are: … ►Leading terms of the of the power series for are: … ►§28.6(ii) Functions and
►Leading terms of the power series for the normalized functions are: …24: 4.4 Special Values and Limits
25: 7.6 Series Expansions
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§7.6(i) Power Series
…26: 27.3 Multiplicative Properties
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►If is multiplicative, then the values for are determined by the values at the prime powers.
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27.3.6
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27.3.7
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27: 33.23 Methods of Computation
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►The power-series expansions of §§33.6 and 33.19 converge for all finite values of the radii and , respectively, and may be used to compute the regular and irregular solutions.
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►Thus the regular solutions can be computed from the power-series expansions (§§33.6, 33.19) for small values of the radii and then integrated in the direction of increasing values of the radii.
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►Noble (2004) obtains double-precision accuracy for for a wide range of parameters using a combination of recurrence techniques, power-series expansions, and numerical quadrature; compare (33.2.7).
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28: 8.24 Physical Applications
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►The function appears in: discussions of power-law relaxation times in complex physical systems (Sornette (1998)); logarithmic oscillations in relaxation times for proteins (Metzler et al. (1999)); Gaussian orbitals and exponential (Slater) orbitals in quantum chemistry (Shavitt (1963), Shavitt and Karplus (1965)); population biology and ecological systems (Camacho et al. (2002)).
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29: 12.1 Special Notation
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►Unless otherwise noted, primes indicate derivatives with respect to the variable, and fractional powers take their principal values.
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