Abstract
In planar piecewise differential systems it is known that when the discontinuity curve is a straight line and both differential systems are linear centers, these piecewise differential systems have no limit cycles but if they are separated by other types of discontinuity curves, such as parabolas, then they have limit cycles. All these results are in the plane and although the qualitative theory of planar piecewise differential systems has been the subject of many research, this is not the case for piecewise differential systems in higher dimensions. In this paper, we study the maximum number of limit cycles of discontinuous piecewise differential systems in \(\mathbb {R}^3\) separated by a paraboloid (elliptic or hyperbolic), and formed by what we call two linear differential centers. We prove that these systems can have at most one limit cycle and that this upper bound is reached. We also provide systems of these types without periodic solutions and with a continuum of periodic solutions.
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Acknowledgements
The first author is supported by the Agencia Estatal de Investigación grant PID2019-104658GB-I00. The second author is partially supported by the Agencia Estatal de Investigación grant PID2019-104658GB-I00, and the H2020 European Research Council grant MSCA-RISE-2017-777911. The third author is partially supported through CAMGSD, IST-ID, projects UIDB/04459/2020 and UIDP/04459/2020.
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Jimenez, J., Llibre, J. & Valls, C. Limit Cycles for Discontinuous Piecewise Differential Systems in \(\mathbb {R}^3\) Separated by a Paraboloid. Differ Equ Dyn Syst (2023). https://doi.org/10.1007/s12591-023-00668-5
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DOI: https://doi.org/10.1007/s12591-023-00668-5