Heine transformations (first, second, third)
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21: 10.4 Connection Formulas
22: 19.15 Advantages of Symmetry
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►Symmetry in of , , and replaces the five transformations (19.7.2), (19.7.4)–(19.7.7) of Legendre’s integrals; compare (19.25.17).
Symmetry unifies the Landen transformations of §19.8(ii) with the Gauss transformations of §19.8(iii), as indicated following (19.22.22) and (19.36.9).
(19.21.12) unifies the three transformations in §19.7(iii) that change the parameter of Legendre’s third integral.
►Symmetry allows the expansion (19.19.7) in a series of elementary symmetric functions that gives high precision with relatively few terms and provides the most efficient method of computing the incomplete integral of the third kind (§19.36(i)).
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23: 2.5 Mellin Transform Methods
§2.5 Mellin Transform Methods
… ►The Mellin transform of is defined by …The inversion formula is given by … ► … ►§2.5(iii) Laplace Transforms with Small Parameters
…24: 19.36 Methods of Computation
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§19.36(ii) Quadratic Transformations
… ►Thompson (1997, pp. 499, 504) uses descending Landen transformations for both and . … ►Descending Gauss transformations of (see (19.8.20)) are used in Fettis (1965) to compute a large table (see §19.37(iii)). …If , then the method fails, but the function can be expressed by (19.6.13) in terms of , for which Neuman (1969b) uses ascending Landen transformations. … ►Bulirsch (1969a, b) extend Bartky’s transformation to by expressing it in terms of the first incomplete integral, a complete integral of the third kind, and a more complicated integral to which Bartky’s method can be applied. …25: 10.9 Integral Representations
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10.9.23
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10.9.24
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10.9.25
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►For the function see §10.25(ii).
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►For the function see §10.25(ii).
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26: 19.25 Relations to Other Functions
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►The transformations in §19.7(ii) result from the symmetry and homogeneity of functions on the right-hand sides of (19.25.5), (19.25.7), and (19.25.14).
…Thus the five permutations induce five transformations of Legendre’s integrals (and also of the Jacobian elliptic functions).
►The three changes of parameter of in §19.7(iii) are unified in (19.21.12) by way of (19.25.14).
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►Inversions of 12 elliptic integrals of the first kind, producing the 12 Jacobian elliptic functions, are combined and simplified by using the properties of .
…For analogous integrals of the second kind, which are not invertible in terms of single-valued functions, see (19.29.20) and (19.29.21) and compare with Gradshteyn and Ryzhik (2000, §3.153,1–10 and §3.156,1–9).
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27: 15.17 Mathematical Applications
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►The logarithmic derivatives of some hypergeometric functions for which quadratic transformations exist (§15.8(iii)) are solutions of Painlevé equations.
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►First, as spherical functions on noncompact Riemannian symmetric spaces of rank one, but also as associated spherical functions, intertwining functions, matrix elements of SL, and spherical functions on certain nonsymmetric Gelfand pairs.
Harmonic analysis can be developed for the Jacobi transform either as a generalization of the Fourier-cosine transform (§1.14(ii)) or as a specialization of a group Fourier transform.
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►Quadratic transformations give insight into the relation of elliptic integrals to the arithmetic-geometric mean (§19.22(ii)).
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►By considering, as a group, all analytic transformations of a basis of solutions under analytic continuation around all paths on the Riemann sheet, we obtain the monodromy group.
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28: 14.17 Integrals
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►In (14.17.1)–(14.17.4), may be replaced by , and in (14.17.3) and (14.17.4), may be replaced by .
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§14.17(v) Laplace Transforms
►For Laplace transforms and inverse Laplace transforms involving associated Legendre functions, see Erdélyi et al. (1954a, pp. 179–181, 270–272), Oberhettinger and Badii (1973, pp. 113–118, 317–324), Prudnikov et al. (1992a, §§3.22, 3.32, and 3.33), and Prudnikov et al. (1992b, §§3.20, 3.30, and 3.31). ►§14.17(vi) Mellin Transforms
►For Mellin transforms involving associated Legendre functions see Oberhettinger (1974, pp. 69–82) and Marichev (1983, pp. 247–283), and for inverse transforms see Oberhettinger (1974, pp. 205–215).29: 35.2 Laplace Transform
§35.2 Laplace Transform
►Definition
… ►Inversion Formula
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►If is the Laplace transform of , , then is the Laplace transform of the convolution , where …30: 14.31 Other Applications
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