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Proceedings of the American Mathematical Society

Published by the American Mathematical Society since 1950, Proceedings of the American Mathematical Society is devoted to shorter research articles in all areas of pure and applied mathematics.

ISSN 1088-6826 (online) ISSN 0002-9939 (print)

The 2020 MCQ for Proceedings of the American Mathematical Society is 0.85.

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Almost periodic solutions for a certain class of almost periodic systems
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by George Seifert PDF
Proc. Amer. Math. Soc. 84 (1982), 47-51 Request permission

Abstract:

Using a result due to Medvedev [3], we obtain conditions under which systems of ordinary differential equations of the form $x’ = F(t,x,x) + G(t,x)$ where $F$ and $G$ are almost periodic in $t$ will have unique almost periodic solutions with certain global stability properties and module containment. These conditions are compared to conditions for the existence, but not uniqueness, for such solutions obtained by Kartsatos in [2]. Both results, our as well as Kartsatos’, are applied to a second order equation of Lienard type with almost periodic forcing.
References
  • A. M. Fink, Almost periodic differential equations, Lecture Notes in Mathematics, Vol. 377, Springer-Verlag, Berlin-New York, 1974. MR 0460799
  • Athanassios G. Kartsatos, Almost periodic solutions to nonlinear systems, Boll. Un. Mat. Ital. (4) 9 (1974), 10–15 (English, with Italian summary). MR 0355201
  • N. V. Medvedev, Certain criteria for the existence of bounded solutions of a system of differential equations, Differencial′nye Uravnenija 4 (1968), 1258–1264 (Russian). MR 0230979
  • T. Yoshizawa, Stability theory and the existence of periodic solutions and almost periodic solutions, Applied Mathematical Sciences, Vol. 14, Springer-Verlag, New York-Heidelberg, 1975. MR 0466797
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Additional Information
  • © Copyright 1982 American Mathematical Society
  • Journal: Proc. Amer. Math. Soc. 84 (1982), 47-51
  • MSC: Primary 34C27
  • DOI: https://doi.org/10.1090/S0002-9939-1982-0633275-3
  • MathSciNet review: 633275