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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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Subharmonic solutions of conservative systems with nonconvex potentials
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by A. Fonda and A. C. Lazer PDF
Proc. Amer. Math. Soc. 115 (1992), 183-190 Request permission

Abstract:

We consider the system of second order differential equations \[ u'' + \nabla G(u) = e(t) \equiv e(t + T),\], where the potential $G:{\mathbb {R}^n} \to \mathbb {R}$ is not necessarily convex. Using critical point theory, we give conditions under which the system has infinitely many subharmonic solutions.
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Additional Information
  • © Copyright 1992 American Mathematical Society
  • Journal: Proc. Amer. Math. Soc. 115 (1992), 183-190
  • MSC: Primary 34C25; Secondary 34B15, 47H15, 58F22, 70K40
  • DOI: https://doi.org/10.1090/S0002-9939-1992-1087462-X
  • MathSciNet review: 1087462