functional equation
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11: 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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12: 10.1 Special Notation
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►For older notations see British Association for the Advancement of Science (1937, pp. xix–xx) and Watson (1944, Chapters 1–3).
13: 27.21 Tables
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►Table III lists all solutions of the equation
, and Table IV lists all solutions of the equation
for all .
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14: 25.15 Dirichlet -functions
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25.15.1
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25.15.3
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►When is a primitive character (mod ) the -functions satisfy the functional equation:
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25.15.10
15: 14.31 Other Applications
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§14.31(i) Toroidal Functions
►Applications of toroidal functions include expansion of vacuum magnetic fields in stellarators and tokamaks (van Milligen and López Fraguas (1994)), analytic solutions of Poisson’s equation in channel-like geometries (Hoyles et al. (1998)), and Dirichlet problems with toroidal symmetry (Gil et al. (2000)). … ►§14.31(ii) Conical Functions
… ►§14.31(iii) Miscellaneous
►Many additional physical applications of Legendre polynomials and associated Legendre functions include solution of the Helmholtz equation, as well as the Laplace equation, in spherical coordinates (Temme (1996b)), quantum mechanics (Edmonds (1974)), and high-frequency scattering by a sphere (Nussenzveig (1965)). …16: Peter A. Clarkson
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►Clarkson has published numerous papers on integrable systems (primarily Painlevé equations), special functions, and symmetry methods for differential equations.
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17: 27.14 Unrestricted Partitions
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27.14.2
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§27.14(iv) Relation to Modular Functions
… ► satisfies the following functional equation: if are integers with and , then … ►§27.14(vi) Ramanujan’s Tau Function
… ►and satisfies the functional equation …18: 10.13 Other Differential Equations
19: 20.13 Physical Applications
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►The functions
, , provide periodic solutions of the partial differential equation
…with .
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►Theta-function solutions to the heat diffusion equation with simple boundary conditions are discussed in Lawden (1989, pp. 1–3), and with more general boundary conditions in Körner (1989, pp. 274–281).
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►This allows analytic time propagation of quantum wave-packets in a box, or on a ring, as closed-form solutions of the time-dependent Schrödinger equation.