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.
Citation: Chunmei Song, Qihuai Liu, Guirong Jiang. Harmonic and subharmonic solutions of quadratic Liénard type systems with sublinearity[J]. AIMS Mathematics, 2021, 6(11): 12913-12928. doi: 10.3934/math.2021747
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.
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Chunmei Song, Qihuai Liu, Guirong Jiang. Harmonic and subharmonic solutions of quadratic Liénard type systems with sublinearity[J]. AIMS Mathematics, 2021, 6(11): 12913-12928. doi: 10.3934/math.2021747
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