dominant%20solutions
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1: 2.9 Difference Equations
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►If , or if and , then is recessive and is dominant as .
As in the case of differential equations (§§2.7(iii), 2.7(iv)) recessive solutions are unique and dominant solutions are not; furthermore, one member of a numerically satisfactory pair has to be recessive.
When and neither solution is dominant and both are unique.
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►But there is an independent solution
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2: 36.5 Stokes Sets
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►The Stokes sets are defined by the exponential dominance condition:
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36.5.7
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►For , there are two solutions
, provided that .
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►The first sheet corresponds to and is generated as a solution of Equations (36.5.6)–(36.5.9).
…For the second sheet is generated by a second solution of (36.5.6)–(36.5.9), and for it is generated by the roots of the polynomial equation
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3: 2.7 Differential Equations
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►has twice-continuously differentiable solutions
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is a recessive (or subdominant) solution as , and is a dominant solution as .
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►as , being recessive and
dominant.
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§2.7(iv) Numerically Satisfactory Solutions
… ►The solutions and are respectively recessive and dominant as , and vice versa as . …4: 3.6 Linear Difference Equations
§3.6 Linear Difference Equations
… ►§3.6(ii) Homogeneous Equations
… ► … ► … ►Thus is dominant and can be computed by forward recursion, whereas is recessive and has to be computed by backward recursion. …5: 36.11 Leading-Order Asymptotics
6: 27.15 Chinese Remainder Theorem
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►The Chinese remainder theorem states that a system of congruences , always has a solution if the moduli are relatively prime in pairs; the solution is unique (mod ), where is the product of the moduli.
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►Their product has 20 digits, twice the number of digits in the data.
…These numbers, in turn, are combined by the Chinese remainder theorem to obtain the final result , which is correct to 20 digits.
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7: 2.11 Remainder Terms; Stokes Phenomenon
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►In effect, (2.11.7) “corrects” (2.11.6) by introducing a term that is relatively exponentially small in the neighborhood of , is increasingly significant as passes from to , and becomes the dominant contribution after passes .
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►Rays (or curves) on which one contribution in a compound asymptotic expansion achieves maximum dominance over another are called Stokes lines ( in the present example).
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§2.11(v) Exponentially-Improved Expansions (continued)
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2.11.19
,
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►For example, using double precision is found to agree with (2.11.31) to 13D.
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8: Bibliography H
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Asymptotic expansion of a class of integral transforms with algebraically dominated kernels.
J. Math. Anal. Appl. 35 (2), pp. 405–433.
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High frequency solutions of the delta wing equations.
Proc. Roy. Soc. Edinburgh Sect. A 81 (3-4), pp. 299–316.
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Numerical Tools for the Study of Finite Gap Solutions of Integrable Systems.
Ph.D. Thesis, Technischen Universität Berlin.
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Solutions of Poisson’s equation in channel-like geometries.
Comput. Phys. Comm. 115 (1), pp. 45–68.
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9: 18.39 Applications in the Physical Sciences
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►The solutions of (18.39.8) are subject to boundary conditions at and .
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►The solutions (18.39.8) are called the stationary states as separation of variables in (18.39.9) yields solutions of form
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►Brief mention of non-unit normalized solutions in the case of mixed spectra appear, but as these solutions are not OP’s details appear elsewhere, as referenced.
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►Interactions between electrons, in many electron atoms, breaks this degeneracy as a function of , but still dominates.
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►The radial Coulomb wave functions
, solutions of
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