Abstract
For the Gurtin–Pipkin integro-differential equation whose relaxation kernel can be represented as a Stieltjes integral of a decaying exponential along the positive half-line, we describe a representation of the nonreal spectrum asymptotics versus the asymptotic characteristics of the Stieltjes measure and the behavior of the relaxation kernel itself at zero. The application of the results obtained to the kernels most widely used in practice is demonstrated.
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Notes
Here and in what follows, by \(V_a^b\) we denote the variation of a function on the interval \([a,b]\) .
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ACKNOWLEDGMENTS
The author expresses his deep gratitude to Prof. V.V. Vlasov for stating the problem, scientific guidance, and active support, as well as to the participants of the scientific seminar “Functional-differential and integro-differential equations and their spectral analysis,” in particular, N.A. Rautian, for support and valuable advice.
The author is grateful to the referee for constructive remarks that contributed to the improvement of the text of the article.
Funding
This work was supported by a grant from Lomonosov Moscow State University Scientific School “Mathematical Methods for the Analysis of Complex Systems,” led by Acad. V.A. Sadovnichii, as well as with the financial support of the Foundation for the Development of Theoretical Physics and Mathematics “Basis.”
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Translated by V. Potapchouck
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Davydov, A.V. On the Asymptotics of the Nonreal Spectrum of the Integro-Differential Gurtin–Pipkin Equation with Relaxation Kernels Representable in the Form of the Stielties Integral. Diff Equat 58, 242–255 (2022). https://doi.org/10.1134/S0012266122020094
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DOI: https://doi.org/10.1134/S0012266122020094