Density of the rational obstructed boundary in the obstructed boundary
Density of the rational obstructed boundary in the obstructed boundary
Let be a hyperbolic component of disjoint type. Define its obstructed boundary by
Let be the subset of for which all indifferent multipliers are rational, of the form . The rational-boundary density conjecture.
Consequently, the natural extension of the multiplier map identifies the regular boundary as
This would describe the boundary at infinity through obstructed geometrically finite maps and support an extension of the quadratic-like theory using sector renormalization, but the statement is presented as a conjecture.
Sources & referencesView supporting material
Primary source
Dzimitry Dudko and Yusheng Luo, “Sierpinski carpet hyperbolic components of disjoint type are bounded”, arXiv:2509.25658 (2025).
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