Pseudocenter conjecture for entropy on Mandelbrot wakes

Let θ1<θ2\theta_1<\theta_2 be external angles whose parameter rays RM(θ1)R_M(\theta_1) and RM(θ2)R_M(\theta_2) land at the same parameter on the boundary of the Mandelbrot set. Let h(θ)h(\theta) be the entropy of the Hubbard tree corresponding to the parameter with external angle θ\theta, and let θ\theta^* be the pseudocenter of the interval [θ1,θ2][\theta_1,\theta_2]. Pseudocenter conjecture. The maximum of the entropy on this interval is attained at its pseudocenter:

maxθ[θ1,θ2]h(θ)=h(θ)\max_{\theta\in[\theta_1,\theta_2]}h(\theta)=h(\theta^*)

This conjecture connects the combinatorial entropy of Hubbard trees with the geometry of wakes in the Mandelbrot set. The supplied text gives no resolution, so the assertion remains open.

Sources & referencesView supporting material

Primary source

Giulio Tiozzo, “Topological entropy of quadratic polynomials and dimension of sections of the Mandelbrot set”, arXiv:1305.3542 (2013).

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