We prove the existence of multiple periodic solutions for weakly coupled parametrized systems with a singularity of repulsive type at the origin and linear growth at infinity. The proof is based on a higher dimensional Poincaré-Birkhoff theorem and the phase-plane analysis of the solutions.
Citation: Shuang Wang, Chunlian Liu. Multiplicity of periodic solutions for weakly coupled parametrized systems with singularities[J]. Electronic Research Archive, 2023, 31(6): 3594-3608. doi: 10.3934/era.2023182
We prove the existence of multiple periodic solutions for weakly coupled parametrized systems with a singularity of repulsive type at the origin and linear growth at infinity. The proof is based on a higher dimensional Poincaré-Birkhoff theorem and the phase-plane analysis of the solutions.
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