Planar Nonautonomous Polynomial Equations Iv . Nonholomorphic Case
نویسنده
چکیده
We give a few sufficient conditions for the existence of periodic solutions of the equation ż = Pn j=0 aj(t)z j − Pr k=1 ck(t)z k where n > r and aj ’s, ck’s are complex valued. We prove the existence of one up to two periodic solutions.
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