locally%20integrable
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11: 18.39 Applications in the Physical Sciences
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►These eigenfunctions are quantum wave-functions whose absolute values squared give the probability density of finding the single particle at hand at position in the th eigenstate, namely that probability is = , being a localized interval on the -axis.
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►with an infinite set of orthonormal eigenfunctions
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►Derivations of (18.39.42) appear in Bethe and Salpeter (1957, pp. 12–20), and Pauling and Wilson (1985, Chapter V and Appendix VII), where the derivations are based on (18.39.36), and is also the notation of Piela (2014, §4.7), typifying the common use of the associated Coulomb–Laguerre polynomials in theoretical quantum chemistry.
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►The bound state eigenfunctions of the radial Coulomb Schrödinger operator are discussed in §§18.39(i) and 18.39(ii), and the -function normalized (non-) in Chapter 33, where the solutions appear as Whittaker functions.
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►The fact that non- continuum scattering eigenstates may be expressed in terms or (infinite) sums of functions allows a reformulation of scattering theory in atomic physics wherein no non- functions need appear.
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12: 35.2 Laplace Transform
13: 1.4 Calculus of One Variable
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Maxima and Minima
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…14: 3.7 Ordinary Differential Equations
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3.7.1
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►Assume that we wish to integrate (3.7.1) along a finite path from to in a domain .
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3.7.6
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3.7.7
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►The larger the absolute values of the eigenvalues that are being sought, the smaller the integration steps need to be.
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15: 4.42 Solution of Triangles
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16: 31.7 Relations to Other Functions
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31.7.1
►Other reductions of to a , with at least one free parameter, exist iff the pair takes one of a finite number of values, where .
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31.7.2
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31.7.3
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31.7.4
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17: 36.5 Stokes Sets
18: 9.13 Generalized Airy Functions
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9.13.1
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9.13.19
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9.13.25
, ,
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►The integration paths , , , are depicted in Figure 9.13.1.
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9.13.32
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19: 12.11 Zeros
20: 1.18 Linear Second Order Differential Operators and Eigenfunction Expansions
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►We integrate by parts twice giving:
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►Eigenfunctions corresponding to the continuous spectrum are non- functions.
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►Should be bounded but random, leading to Anderson localization, the spectrum could range from being a dense point spectrum to being singular continuous, see Simon (1995), Avron and Simon (1982); a good general reference being Cycon et al. (2008, Ch. 9 and 10).
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►Thus, and this is a case where is not continuous, if , , there will be an eigenfunction localized in the vicinity of , with a negative eigenvalue, thus disjoint from the continuous spectrum on .
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