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Eigenfunctions of Ordinary Differential Euler Operators

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Abstract

Asymptotic solutions of the eigenvalue problem for an Euler operator in a neighborhood of a regular singular point are considered. We find a condition under which the asymptotic expansion is free of logarithms. Eigenvalues expressed in terms of elementary functions in the form of a finite sum of quasi-polynomials are obtained for third-order Euler operators and also for commuting Euler operators of sixth and ninth orders. The problem on common eigenfunctions for commuting Euler operators is examined. In the case of operators of rank 2 and 3, it can be reduced to second- and third-order Bessel equations by differential substitutions.

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Authors and Affiliations

  1. Institute of Mathematics with Computing Center, Ufa Federal Research Center of the Russian Academy of Sciences, Ufa, Russia

    Yu. Yu. Bagderina

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  1. Yu. Yu. Bagderina
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Correspondence to Yu. Yu. Bagderina.

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Translated from Itogi Nauki i Tekhniki, Seriya Sovremennaya Matematika i Ee Prilozheniya. Tematicheskie Obzory, Vol. 152, Mathematical Physics, 2018.

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Bagderina, Y.Y. Eigenfunctions of Ordinary Differential Euler Operators. J Math Sci 252, 125–134 (2021). https://doi.org/10.1007/s10958-020-05147-8

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  • DOI: https://doi.org/10.1007/s10958-020-05147-8

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