removable%20singularity
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11: 25.2 Definition and Expansions
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►It is a meromorphic function whose only singularity in is a simple pole at , with residue 1.
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25.2.4
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12: Errata
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Subsection 14.3(iv)
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Equation (5.11.14)
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Section 36.1 Special Notation
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Equation (25.2.4)
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References
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A sentence was added at the end of this subsection indicating that from (15.9.15), it follows that and are removable singularities.
The previous constraint was removed, see Fields (1966, (3)).
The entry for to represent complex conjugation was removed (see Version 1.0.19).
The original constraint, , was removed because, as stated after (25.2.1), is meromorphic with a simple pole at , and therefore is an entire function.
Suggested by John Harper.
13: 11.6 Asymptotic Expansions
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14: 5.10 Continued Fractions
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15: Bibliography O
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Exponentially improved asymptotic solutions of ordinary differential equations. II Irregular singularities of rank one.
Proc. Roy. Soc. London Ser. A 445, pp. 39–56.
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Hyperasymptotic solutions of higher order linear differential equations with a singularity of rank one.
Proc. Roy. Soc. London Ser. A 454, pp. 1–29.
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Error bounds for asymptotic solutions of second-order differential equations having an irregular singularity of arbitrary rank.
J. Soc. Indust. Appl. Math. Ser. B Numer. Anal. 2 (2), pp. 244–249.
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On the asymptotic solution of second-order differential equations having an irregular singularity of rank one, with an application to Whittaker functions.
J. Soc. Indust. Appl. Math. Ser. B Numer. Anal. 2 (2), pp. 225–243.
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Asymptotic solutions of linear ordinary differential equations at an irregular singularity of rank unity.
Methods Appl. Anal. 4 (4), pp. 375–403.
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16: 14.3 Definitions and Hypergeometric Representations
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►From (15.9.15) it follows that and are removable singularities of the right-hand sides of (14.3.21) and (14.3.22).
17: Bibliography
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Unsteady lifting-line theory as a singular-perturbation problem.
J. Fluid Mech 153, pp. 59–81.
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Scattering by singular potentials with a perturbation – Theoretical introduction to Mathieu functions.
J. Mathematical Phys. 16, pp. 961–970.
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Singularities of Differentiable Maps. Vol. II.
Birkhäuser, Boston-Berlin.
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Normal forms of functions near degenerate critical points, the Weyl groups and Lagrangian singularities.
Funkcional. Anal. i Priložen. 6 (4), pp. 3–25 (Russian).
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Singular Continuous Spectrum for a Class of Almost Periodic Jacobi Matrices.
Bulletin of the American Mathematical Society 6 (1), pp. 81–85.
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18: 17.5 Functions
19: Bibliography F
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Sur certaines sommes des intégral-cosinus.
Bull. Soc. Math. Phys. Serbie 12, pp. 13–20 (French).
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Numerical calculation of singular integrals related to Hankel transform.
Comput. Math. Appl. 21 (2-3), pp. 87–94.
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Singularity analysis of generating functions.
SIAM J. Discrete Math. 3 (2), pp. 216–240.
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On weighted polynomial approximation on the whole real axis.
Acta Math. Acad. Sci. Hungar. 20, pp. 223–225.
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20: 31.12 Confluent Forms of Heun’s Equation
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►Confluent forms of Heun’s differential equation (31.2.1) arise when two or more of the regular singularities merge to form an irregular singularity.
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►This has regular singularities at and , and an irregular singularity of rank 1 at .
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►This has irregular singularities at and , each of rank .
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►This has a regular singularity at , and an irregular singularity at of rank .
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►This has one singularity, an irregular singularity of rank at .
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