Abstract
We introduce necessary and sufficient conditions for the existence of periodic solutions of the equation $$ u'' + f(u)u' + g(u) = h(t), $$ where $g$ has a singularity of repulsive type at the origin and $f$ is arbitrary.
Citation
Pierpaolo Omari. Wei Yin Ye. "Necessary and sufficient conditions for the existence of periodic solutions of second-order ordinary differential equations with singular nonlinearities." Differential Integral Equations 8 (7) 1843 - 1858, 1995. https://doi.org/10.57262/die/1368397762
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