2015/12/16 by Pascale Roesch, Xiaoguang Wang, Roesch, Pascale +3 · 1 citation
Mathematics · #Mathematical Dynamics and Fractals #Advanced Differential Equations and Dynamical Systems #Mathematics and Applications
paper · pdf · doi:10.48550/arxiv.1512.05098
In this article, we study the topology and bifurcations of the moduli space M3 of cubic Newton maps. It's a subspace of the moduli space of cubic rational maps, carrying the Riemann orbifold structure (\mathbb\widehatC, (2,3,∞)). We prove two results: (1). The boundary of the unique unbounded hyperbolic component is a Jordan arc and the boundaries of all other hyperbolic components are Jordan curves. (2).The Head's angle map is surjective and monotone. The fibers of this map are characterized completely. The first result is a moduli space analogue of the first author's dynamical regularity theorem \citeRo08. The second result confirms a conjecture of Tan Lei.