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Periodic solutions for indefinite singular equations with applications to the weak case

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arxiv 1707.04513 v1 pith:CZM7EYPJ submitted 2017-07-14 math.DS

classification math.DS
keywords equationlambdamathbbperiodicweakapplicationsbegincase
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abstract

As a consequence of the main result of this paper efficient conditions guaranteeing the existence of a $T-$periodic solution to the second order differential equation \begin{equation*} u"=\frac{h(t)}{u^{\lambda}} \end{equation*} are established. Here, $h\in L(\mathbb{R}/T\mathbb{Z})$ is a piecewise-constant sign-changing function where the non-linear term presents a weak singularity at 0 (i.e. $\lambda\in (0,1)$).

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