Newton flows for elliptic functions I: Structural stability: characterization & genericity

作者：Helminck G F^*; Twilt F

来源：Complex Variables and Elliptic Equations, 2018, 63(6): 815-835.

DOI：10.1080/17476933.2017.1350853

• Dynamical system
• Newton flow (rational-
• elliptic-
• desingularized)
• structural stability
• elliptic function (Jacobian
• Weierstrass)
• phase portrait
• steady stream

Newton flows are dynamical systems generated by a continuous, desingularized Newton method for mappings from a Euclidean space to itself. We focus on the special case of meromorphic functions on the complex plane. Inspired by the analogy between the rational (complex) and the elliptic (i. e. doubly periodic meromorphic) functions, a theory on the class of so-called Elliptic Newton flows is developed. With respect to an appropriate topology on the set of all elliptic functions f of fixed order r( 2) we prove: For almost all functions f, the corresponding Newton flows are structurally stable i. e. topologically invariant under small perturbations of the zeros and poles for f [genericity]. They can be described in terms of nondegeneracy-properties of f similar to the rational case [characterization].

• 出版日期2018