Global center of polynomial Newton system and its non-isochronicity
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866914313631956992 |
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| author | Christopher, Colin Zhang, Jun Zhang, Weinian |
| author_facet | Christopher, Colin Zhang, Jun Zhang, Weinian |
| contents | Using a new compactification (toroidal compactification) and desingularization, we obtain a complete characterization of monodromy at infinity for polynomial Newton system of arbitrary degree, in which we establish an equivalence between the monodromy and the non-existence of 1/2-fractional formal invariant curves. Combining the complete characterization with either Darboux integrability or algebraic reducibility of local centers, we obtain conditions for all cases of global center. Furthermore, investigating the asymptotic behavior of the period function of orbits near infinity, we prove the non-isochronicity for the global center, which consequently solves an open problem proposed by Conti. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_07315 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Global center of polynomial Newton system and its non-isochronicity Christopher, Colin Zhang, Jun Zhang, Weinian Dynamical Systems 34C05, 34C25, 34D23 Using a new compactification (toroidal compactification) and desingularization, we obtain a complete characterization of monodromy at infinity for polynomial Newton system of arbitrary degree, in which we establish an equivalence between the monodromy and the non-existence of 1/2-fractional formal invariant curves. Combining the complete characterization with either Darboux integrability or algebraic reducibility of local centers, we obtain conditions for all cases of global center. Furthermore, investigating the asymptotic behavior of the period function of orbits near infinity, we prove the non-isochronicity for the global center, which consequently solves an open problem proposed by Conti. |
| title | Global center of polynomial Newton system and its non-isochronicity |
| topic | Dynamical Systems 34C05, 34C25, 34D23 |
| url | https://arxiv.org/abs/2602.07315 |