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- W4287759247 abstract "We consider smooth systems limiting as $epsilon to 0$ to piecewise-smooth (PWS) systems with a boundary-focus (BF) bifurcation. After deriving a suitable local normal form, we study the dynamics for the smooth system with $0 < epsilon ll 1$ using a combination of geometric singular perturbation theory and blow-up. We show that the type of BF bifurcation in the PWS system determines the bifurcation structure for the smooth system within an $epsilon-$dependent domain which shrinks to zero as $epsilon to 0$, identifying a supercritical Andronov-Hopf bifurcation in one case, and a supercritical Bogdanov-Takens bifurcation in two other cases. We also show that PWS cycles associated with BF bifurcations persist as relaxation cycles in the smooth system, and prove existence of a family of stable limit cycles which connects the relaxation cycles to regular cycles within the $epsilon-$dependent domain described above. Our results are applied to models for Gause predator-prey interaction and mechanical oscillation subject to friction." @default.
- W4287759247 created "2022-07-26" @default.
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- W4287759247 date "2020-06-10" @default.
- W4287759247 modified "2023-10-16" @default.
- W4287759247 title "Singularly Perturbed Boundary-Focus Bifurcations" @default.
- W4287759247 doi "https://doi.org/10.48550/arxiv.2006.06087" @default.
- W4287759247 hasPublicationYear "2020" @default.
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