Hostname: page-component-78c5997874-g7gxr Total loading time: 0 Render date: 2024-11-12T22:17:54.444Z Has data issue: false hasContentIssue false

Almost periodic solutions in an integrodifferential equation

Published online by Cambridge University Press:  14 November 2011

Y. Hamaya
Affiliation:
Department of Applied Mathematics, Okayama University of Science, Okayama 700, Japan
T. Yoshizawa
Affiliation:
Department of Applied Mathematics, Okayama University of Science, Okayama 700, Japan

Synopsis

We consider a system of integrodifferential equations

where f(t, x) and F(t, s, x, y) are almost periodic in t uniformly for parameters, and we assume that the system has a bounded solution u(t). To discuss the existence of an almost periodic solution, we consider the relationship between the total stability of u(t) with respect to a certain metric ρ and the separation condition with respect to ρ. Moreover, we discuss a sufficient condition for the existence of a positive almost periodic solution of a model of the dynamics of an n-species system.

Type
Research Article
Copyright
Copyright © Royal Society of Edinburgh 1990

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1Ahmad, S.. On almost periodic solutions on the competing species problem. Proc. Amer. Math. Soc. 102 (1988)., 855861.CrossRefGoogle Scholar
2Alvarez, C. and Lazer, A. C.. An application of topological degree to the periodic competing species problem. J. Austral. Math. Soc. Ser. B 28 (1986)., 202219.CrossRefGoogle Scholar
3Burton, T. A.. Stability and Periodic Solutions of Ordinary and Functional Differential Equations (New York: Academic Press, 1985).Google Scholar
4Gopalsamy, K.. Global asymptotic stability in an almost periodic Lotka-Volterra system. J. Austral. Math. Soc. Ser. B 27 (1986)., 346360.CrossRefGoogle Scholar
5Gopalsamy, K.. Global asymptotic stability in a periodic integrodifferential system. Tôhoku Math. J. (2). 37 (1985)., 323332.Google Scholar
6Hale, J. K.. Theory of Functional Differential Equations (Berlin: Springer, 1977).CrossRefGoogle Scholar
7Hale, J. K.. Asymptotic Behavior of Dissipative Systems (Providence: American Mathematical Society, 1988).Google Scholar
8Hale, J. K. and Kato, J.. Phase space for retarded equations with infinite delay. Funkcial. Ekvac. 21 (1978)., 1141.Google Scholar
9Hamaya, Y.. Total stability property in limiting equations of integrodifferential equations. Funkcial. Ekvac. (to appear).Google Scholar
10Hino, Y.. Stability and existence of almost periodic solutions of some functional differential equations. Tôhoku Math. J. (2) 28 (1976)., 389409.Google Scholar
11Murakami, S.. Almost periodic solutions of a system of integrodifferential equations. Tôhoku Math. J. (2) 39 (1987)., 7179.CrossRefGoogle Scholar
12Yoshizawa, T.. Stability Theory and the Existence of Periodic Solutions and Almost Periodic Solutions (Berlin: Springer, 1975).CrossRefGoogle Scholar