Conjecture on self-similarity of non-escaping loci

Let d0d_0 and dd_\infty be the degree parameters of the family FccC\\{F_c\\}_{c\in\mathbb{C}^*}, and let

\mathcal{M}_{d_0,d_\infty}=\left\\{c\in\mathbb{C}^*: F_c^n(1)\not\to 0\text{ and }F_c^n(1)\not\to\infty\right\\}

be its non-escaping locus. For a stationary type irrational number θ=[0;N,N,N,]\theta=[0;N,N,N,\ldots], write c(θ)c(\theta) for the corresponding parameter.

Self-similarity conjecture. For every stationary type irrational number θ=[0;N,N,N,]\theta=[0;N,N,N,\ldots], the non-escaping locus Md0,d\mathcal{M}_{d_0,d_\infty} is asymptotically self-similar at c(θ)c(\theta), and there is a hyperbolic renormalization operator associated to it.

This is presented as preliminary evidence for asymptotic self-similarity, with the expected mechanism being hyperbolicity of an appropriate renormalization operator. The source gives no resolution of the assertion.

Sources & referencesView supporting material

Primary source

Willie Rush Lim, “A priori bounds and degeneration of Herman rings with bounded type rotation number”, arXiv:2302.07794 (2025).

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