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11: 10.21 Zeros
§10.21(v) Inequalities
For bounds for the smallest real or purely imaginary zeros of J ν ( x ) when ν is real see Ismail and Muldoon (1995). …
12: 19.8 Quadratic Transformations
If 0 < α 2 < k 2 , then ρ is pure imaginary.
13: Bibliography M
  • H. P. Mulholland and S. Goldstein (1929) The characteristic numbers of the Mathieu equation with purely imaginary parameter. Phil. Mag. Series 7 8 (53), pp. 834–840.
  • 14: 19.2 Definitions
    If 1 < k 1 / sin ϕ , then k c is pure imaginary. …
    15: 14.20 Conical (or Mehler) Functions
    For the case of purely imaginary order and argument see Dunster (2013). …
    16: 2.8 Differential Equations with a Parameter
    For error bounds, extensions to pure imaginary or complex u , an extension to inhomogeneous differential equations, and examples, see Olver (1997b, Chapter 10). …
    17: Bibliography B
  • C. B. Balogh (1967) Asymptotic expansions of the modified Bessel function of the third kind of imaginary order. SIAM J. Appl. Math. 15, pp. 1315–1323.
  • M. V. Berry (1980) Some Geometric Aspects of Wave Motion: Wavefront Dislocations, Diffraction Catastrophes, Diffractals. In Geometry of the Laplace Operator (Proc. Sympos. Pure Math., Univ. Hawaii, Honolulu, Hawaii, 1979), Vol. 36, pp. 13–28.
  • N. Bleistein (1966) Uniform asymptotic expansions of integrals with stationary point near algebraic singularity. Comm. Pure Appl. Math. 19, pp. 353–370.
  • W. G. C. Boyd (1990a) Asymptotic Expansions for the Coefficient Functions Associated with Linear Second-order Differential Equations: The Simple Pole Case. In Asymptotic and Computational Analysis (Winnipeg, MB, 1989), R. Wong (Ed.), Lecture Notes in Pure and Applied Mathematics, Vol. 124, pp. 53–73.
  • P. S. Bullen (1998) A Dictionary of Inequalities. Pitman Monographs and Surveys in Pure and Applied Mathematics, Vol. 97, Longman, Harlow.