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arXiv · 2402.07612

Local geometry of Equilibria and a Poincar\'e-Bendixson-type Theorem for Holomorphic Flows

Nicolas Kainz·Dirk Lebiedz
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Abstract

In this paper, we explore the local geometry of dynamical systems $\dot{x}=F(x)$ with real time parameterization, where $F$ is holomorphic on connected open subsets of $\mathbb{C}\stackrel{\sim}{=}\mathbb{R}^2$. We describe the geometry of first-order equilibria. For equilibria of higher orders, we establish an equivalent condition for "definite directions", allowing us to reverse the implication in Theorem 2 of Chapter 2.10 in [Differential equations and dynamical systems, Lawrence Perko (1990)] under the additional condition of holomorphy. This enables the geometric construction of a finite elliptic decomposition. We derive a holomorphic Poincar\'e-Bendixson-type theorem, leading to the conclusion that bounded non-periodic orbits are always homoclinic or heteroclinic.

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Nicolas Kainz, Dirk Lebiedz. 2024-02-12. Local geometry of Equilibria and a Poincar\'e-Bendixson-type Theorem for Holomorphic Flows. https://arxiv.org/abs/2402.07612

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