Asymptotic behaviour of the inflection points of Bessel functions

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Abstract

Asymptotic expansions are derived for the inflection pointsj"vkof the Bessel functionJv(x), ask→ ∞ for fixedvand asv→ ∞ for fixedk. Also derived is an asymptotic expansion ofJv(j"vk) asv→ ∞. Finally, we prove thatj"v√2 ifʎ≽ (0.07041)v+ 0.25 andv≽ 7, which implies by a recent result of Lorch & Szego that the sequence {|Jv(j"vk)|} is decreasing, forkʎ,ʎ+ 1,ʎ+ 2,....

Publisher

The Royal Society

Subject

General Medicine

Reference9 articles.

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3. Error bounds for asymptotic approximations of zeros of transcendental functions. SIAM J;Hethcote H. W.;Math. Anal.,1970

4. Lorch L. & Szego P. 1990 On the points of inflection of Bessel functions of positive order. I. Can. J. Math. (In the press.)

5. Higher monotonicity properties of Sturm-Liouville functions. IV. Can. J;Lorch L.;Math.,1972

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