L orthornormal basis
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1: 23.21 Physical Applications
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βΊIn §22.19(ii) it is noted that Jacobian elliptic functions provide a natural basis of solutions for problems in Newtonian classical dynamics with quartic potentials in canonical form .
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βΊ
23.21.1
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βΊ
23.21.3
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βΊ
23.21.5
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2: 18.39 Applications in the Physical Sciences
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βΊwhere is the (squared) angular momentum operator (14.30.12).
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βΊwith an infinite set of orthonormal eigenfunctions
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βΊis tridiagonalized in the complete non-orthogonal (with measure , ) basis of Laguerre functions:
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βΊFor either sign of , and chosen such that , , truncation of the basis to terms, with , the discrete eigenvectors are the orthonormal functions
…This equivalent quadrature relationship, see Heller et al. (1973), Yamani and Reinhardt (1975), allows extraction of scattering information from the finite dimensional functions of (18.39.53), provided that such information involves potentials, or projections onto functions, exactly expressed, or well approximated, in the finite basis of (18.39.44).
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3: 25.15 Dirichlet -functions
§25.15 Dirichlet -functions
βΊ§25.15(i) Definitions and Basic Properties
βΊThe notation was introduced by Dirichlet (1837) for the meromorphic continuation of the function defined by the series … … βΊ§25.15(ii) Zeros
…4: 1.18 Linear Second Order Differential Operators and Eigenfunction Expansions
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βΊ
§1.18(ii) spaces on intervals in
… βΊAssume that is an orthonormal basis of . …where the limit has to be understood in the sense of convergence in the mean: … βΊThe eigenfunctions form a complete orthogonal basis in , and we can take the basis as orthonormal: … βΊEigenfunctions corresponding to the continuous spectrum are non- functions. …5: 31.15 Stieltjes Polynomials
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βΊ
31.15.12
βΊThe normalized system of products (31.15.8) forms an orthonormal basis in the Hilbert space .
For further details and for the expansions of analytic functions in this basis see Volkmer (1999).
6: 18.4 Graphics
7: 30.15 Signal Analysis
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βΊThe sequence , forms an orthonormal basis in the space of -bandlimited functions, and, after normalization, an orthonormal basis in .
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βΊtaken over all subject to
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8: 23.10 Addition Theorems and Other Identities
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βΊ
23.10.10
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βΊ
23.10.17
βΊ
23.10.18
βΊ
23.10.19
βΊAlso, when is replaced by the lattice invariants and are divided by and , respectively.
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9: 18.36 Miscellaneous Polynomials
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βΊ