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On the positive roots of an equation involving modified Bessel functions

Published online by Cambridge University Press:  20 January 2009

M. E. Muldoon
Affiliation:
Department of MathematicsYork UniversityNorth York, Ontario M3J 1P3, Canada
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Abstract

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We use the Mittag-Leffler partial fractions expansion of jv + 1(x)/Jv(x) to give simple proofs of some recent results due to S. H. Lehnigk concerning the number of positive roots of the equation ( −Br2 + A + q)Iq(r) + rIq,+ 1(r)=0, where A is real, B>0 and q>−1.

Type
Research Article
Copyright
Copyright © Edinburgh Mathematical Society 1990

References

REFERENCES

1.Ifantis, E. K., Siafarikas, P. D. and Kouris, C. B., The imaginary zeros of a mixed Bessel function, Z. Angew. Math. Phys. 39 (1988), 157169.CrossRefGoogle Scholar
2.Ismail, M. E. H. and Muldoon, M. E., Zeros of combinations of Bessel functions and their derivatives, Appl. Anal. 31 (1988), 7390.CrossRefGoogle Scholar
3.Lehnigk, S. H., On the positive roots of an equation involving a Bessel function, Proc. Edinburgh Math. Soc. 32 (1989), 157164.CrossRefGoogle Scholar
4.Watson, G. N., A Treatise on the Theory of Bessel Functions, 2nd ed. (Cambridge University Press, 1944).Google Scholar