Tan–Lei similarity conjecture for cubic superattracting parameter curves

From papers

Let F=Fa,vF=F_{a,v} be a cubic polynomial in the superattracting period-pp parameter curve 4Sp44\mathcal{S}_p4, written in the normal form

Fa,v(z)=z33a2z+(2a3+v).F_{a,v}(z)=z^3-3a^2z+(2a^3+v).

Assume that FF is a Misiurewicz map, meaning that its free critical point aF-a_F is repelling and strictly preperiodic; let KFK_F be its filled Julia set and let 2aF2a_F be the free co-critical point. Tan–Lei similarity conjecture. Under iterated magnification, the connectedness locus around FF looks more and more like KFK_F around 2aF2a_F, up to a fixed scale change and rotation. This conjecture predicts that the parameter-space geometry of the cubic curve 4Sp44\mathcal{S}_p4 near Misiurewicz maps asymptotically reproduces the corresponding local geometry of the dynamical filled Julia set. The supplied text does not state whether the conjecture has been resolved.

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Sources & referencesView supporting material

Primary source

Araceli Bonifant and Brady Young, “Similarity at Misiurewicz Maps in the Cubic Parameter Curves”, arXiv:2510.26515 (2025).

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