Almost-everywhere zero-measure conjecture for random Julia sets

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For each uu, let funf_u^n denote the corresponding iterated random rational map, and let Ju\mathcal J_u be its random Julia set. Lebesgue measure is taken on the relevant complex sphere.

Almost-everywhere zero-measure conjecture. For Lebesgue almost all uu, Ju\mathcal J_u has zero Lebesgue measure.

The source suggests approaching this through postcritical sets, Koebe estimates, and parameter-elimination techniques, and notes that the analogous statement for the logistic family is known. The conjecture remains unresolved in the stated setting.

References

Primary source

Abbas Fakhari, Ale Jan Homburg and Sebastian van Strien, “Intermingled basins: Kan's example on the Riemann sphere”, arXiv:2606.04783 (2026).

Additional references

15 papers in this index state this conjecture (2004–2026). The statement above is taken from the most recent of them; the others are arXiv:2603.15715, arXiv:2504.20833, arXiv:2307.16102, arXiv:2202.07558, arXiv:1904.06144, arXiv:1709.08236, arXiv:1504.06795, arXiv:1409.2744, arXiv:1402.0208, arXiv:1310.0336, arXiv:0911.5301, arXiv:math/0504377, and 2 more.

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