AIMS Mathematics | 2021

Harmonic and subharmonic solutions of quadratic Liénard type systems with sublinearity



In this paper, we prove the existence of harmonic solutions and infinitely many subharmonic solutions of dissipative second order sublinear differential equations named quadratic Liénard type systems. The method of the proof is based on the Poincaré-Birkhoff twist theorem.

Volume None
Pages None
DOI 10.3934/math.2021747
Language English
Journal AIMS Mathematics

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